VanguardLH wrote:

> Andy Burns wrote:
>
>> Sticks wrote:
>>
>>> it was more to dispose of it than it was to purchase it new.
>>
>> Materials like plasterboard (aka sheetrock) have reached that point
>> over here, my walls must be very dangerous ...
>
> You can't slice them up (for small jobs) to put in the trash?

Previously they provided a free skip for plasterboard and old sacks of
plaster at the waste depot, and people used it, but now some districts
(mine included) have started charging to use that skip, at more than the
stuff costs to buy.

So naturally I do the same as many people do, slowly dispose of a small
amount each week in the rubbish bin.

> Or contract a dumpster during construction? Here the sheetrock can
> go into landfills.
Nowhere near enough of the stuff to justify a skip, just offcuts
totalling a couple of sheets.

It used to be allowed in mixed landfills, but now they like to separate
plasterboard from organic material, because when mixed it can release
sulphurous compounds as it decomposes, so it has to go to its own gypsum
landfill, except their charging policy means they get exactly what they
don't want.

> Your choice how you get it there. Some places prefer to
> recycle it, like to use the gypsum as a soil conditioner.

I did consider burying it

> You could donate it to a local Habitat for Humanity.

We don't seem to have an equivalent over here.

> Presumably if you have full unused sheets, you would return it to the
> store for a refund.
Oh this stuff is beyond use or returning, it's been stored in a damp
garage for years, it's all bent, dinged and mouldy.

On 2021-08-30 04:32, Ed Cryer wrote:
> All the websites I've looked at say use it for cleaning inside PCs. When
> you separate heatsink from CPU, clean with it.

make sure you re-apply new thermal grease. it is needed for proper
cooling for the CPU.

Also you should use the purest form you can find. Typical drug store
isoporpyl alcohol is 30% water and leaves a dusty film when it dries.

> Well, I've called in Currys/ PC World, Boots, Superdrug, Asda and a
> local PC repair shop; and not a one has any. There are lots of brands
> available on Amazon and ebay, however.
>
> Before I order, I wonder if this stuff is the same as surgical spirits,
> or white spirits. I can get those.

possibly, check ingredients list

> What do the bench-men use? Washing-up liquid? Vodka? Saliva?
> Is 99.9% proof alcohol necessary?

I use a good quality spray-can electrical contact cleaner that does not
melt nor fog plastic (and do not spray the screen with it, evar). You
can clean screens by using glass cleaner, sprayed onto a paper towel,
then just wipe it clean.

--
(aka 'Bombastic Bob' in case you wondered)

'Feeling with my fingers, and thinking with my brain' - me

'your story is so touching, but it sounds just like a lie'
"Straighten up and fly right"

Big Bad Bob <BigBadBob-at-mrp3-dot-com@testing.local> wrote:

> Also you should use the purest form you can find. Typical drug store
> isoporpyl alcohol is 30% water and leaves a dusty film when it dries.

Distilled water used for dilution does not leave a residue. They aren't
using tap water! Purity is mandatory for medical supplies. Do NOT use
denatured (ethanol + additives). Do NOT use rubbing alcohol as that may
be ethanol (grain alcohol aka ethyl rubbing alcohol) instead of
isopropanol, and often has additives, like mint, wintergreen, or other
scented oil. 100% IPA is fine, but a waste of money over 70% IPA unless
you happen to find a seller charging the same price for both (unlikely).

Here, at Walgreens pharmacy, prices are for 16 oz. bottles:
70% isopropyl alcohol = $2.19 USD
91% isopropyl alcohol = $2.99 USD

Here in the USA, both dilutions are "typical drug store" potencies.
Just now they happen to have a sale on the 91% for $0.99, and even
better is a "buy 1, get 1 for 50% off". I'll stop by to see if they
still have some. Even if it were for 70%, that's a good sale, and I'd
get some of that. Whether 70% or 91%, both are effective for cleaning
away thermal paste without leaving a residue (as long as you thoroughly
clean away the paste obviously), or prepping surfaces before applying
thermal paste.

>> Well, I've called in Currys/ PC World, Boots, Superdrug, Asda and a
>> local PC repair shop; and not a one has any. There are lots of brands
>> available on Amazon and ebay, however.

Something strange about availability restriction in the UK. In the USA,
we can get 70%, and often 91%, anywhere that sells first aid products.
The 99% to 100% varieties are just too expensive ($19 to $32 USD for 16
oz bottle) to sell in retail stores. 100% IPA isn't in retail stores
because it would never sell. No consumer needs that potency, not even
for cleaning purposes, like prepping surfaces for thermal paste. Only
boobs would pay super high prices for a solvent that works just as well
but at 9 to 16 times less the cost when diluted. 100% IPA is purchased
when using it to mix with other chemicals where water is undesirable,
makes mixing calculations more difficult, or ends up having to use
proportions that would generate a excessive quantity. Although 100% IPA
is not sold in retail stores (because it won't sell at such high
prices), it can be obtained via online order. The retail stores don't
sell it online, again because of its high price, but chemical suppliers
will sell it (usually to hospitals, or for chemical or industrial use).
If they can make money, they'll sell it. Retail stores can't make money
on 100% IPA on their shelves. And shops won't have 100% IPA, because
they know it is cost prohibitive compared to 70% that is more than
sufficient for the same task.

> I use a good quality spray-can electrical contact cleaner that does not
> melt nor fog plastic (and do not spray the screen with it, evar).

Brand and product name of the contact cleaner?

You could use, say, WD-40 Specialist Electrical Contact Cleaner Spray
(this is NOT their WD-40 lubricant), but you're paying a far higher cost
than needed (for the OP's job of cleaning the CPU and heatsink
surfaces), plus you cannot use it for medicinal uses.

https://files.wd40.com/pdf/sds/specialist/wd-40-specialist-electrical-contact-cleaner-spray-us-ghs.pdf
Components:
- Heptane
- Isopropyl alcohol <--- Oooh, lookie, there's the IPA
- Difluoroethane
$19 USD for 12 oz spray can (far more expensive than 70% or 91% IPA)

Heptane is used a non-polar solvent to dissolve adhesives, or other
gooey substances, or in rubber cement because it evaporates quickly. It
is the primary component of gasoline, and used to adjust the octane
level (100% heptane has a value of zero in octane rating). Heptane is
NOT needed to clean or dissolve thermal paste. You don't also need to
get into tiny places using a straw attached to a spray can to clean
thermal paste or prep the surfaces of a CPU and heatsink.

Difluoroethane is the propellant used in aerosol sprays and gas duster
cans, and often listed as R-152A (refrigerant-152A). Used as an
alternative to CFCs, an ozone depletion potential is zero, and a short
1.4 year atmospheric lifetime.

So, for thermal paste, the heptane is an irrelevant component, and it is
the IPA that is doing the cleaning of the thermal paste. Maybe if you
were to buy the CPU and heatsink at a garage sale might some boob have
put stickers on the contact surfaces that you'd have to remove the
sticker's adhesive, but IPA works on many adhesives, too.

The advantage with a spray is you can get the straw into small openings
to clean inside an assembly without having to dismantle, but you could
also use a reusable pressure bottle in which you spray IPA. However,
for the OP's task, you definitely do NOT want a spray. Contact cleaner
spray is an example of a highly overpriced usable product, but used for
the wrong job.

VanguardLH wrote:

> Something strange about availability restriction in the UK.

I don't believe there are any such restrictions, I suspect (like many
things) it has fallen down the following loop

1) Low sales so taken off the shelves
2) People ask why it's not on shelves, get told it's because nobody ever
asks for it
3) Get told we can order some in for you next day
5) Customer decides they might as well order online
6) Low special order volumes so gets removed from next day stock too.

Then after a while you can only order it from "specialised" places.

On 2021-09-08 1:00 p.m., VanguardLH wrote:
> Big Bad Bob <BigBadBob-at-mrp3-dot-com@testing.local> wrote:
>
>> Also you should use the purest form you can find. Typical drug store
>> isoporpyl alcohol is 30% water and leaves a dusty film when it dries.
>
> Distilled water used for dilution does not leave a residue. They aren't
> using tap water! Purity is mandatory for medical supplies. Do NOT use
> denatured (ethanol + additives). Do NOT use rubbing alcohol as that may
> be ethanol (grain alcohol aka ethyl rubbing alcohol) instead of
> isopropanol, and often has additives, like mint, wintergreen, or other
> scented oil. 100% IPA is fine, but a waste of money over 70% IPA unless
> you happen to find a seller charging the same price for both (unlikely).
>
> Here, at Walgreens pharmacy, prices are for 16 oz. bottles:
> 70% isopropyl alcohol = $2.19 USD
> 91% isopropyl alcohol = $2.99 USD
>
> Here in the USA, both dilutions are "typical drug store" potencies.
> Just now they happen to have a sale on the 91% for $0.99, and even
> better is a "buy 1, get 1 for 50% off". I'll stop by to see if they
> still have some. Even if it were for 70%, that's a good sale, and I'd
> get some of that. Whether 70% or 91%, both are effective for cleaning
> away thermal paste without leaving a residue (as long as you thoroughly
> clean away the paste obviously), or prepping surfaces before applying
> thermal paste.
>
>>> Well, I've called in Currys/ PC World, Boots, Superdrug, Asda and a
>>> local PC repair shop; and not a one has any. There are lots of brands
>>> available on Amazon and ebay, however.
>
> Something strange about availability restriction in the UK. In the USA,
> we can get 70%, and often 91%, anywhere that sells first aid products.
> The 99% to 100% varieties are just too expensive ($19 to $32 USD for 16
> oz bottle) to sell in retail stores. 100% IPA isn't in retail stores
> because it would never sell. No consumer needs that potency, not even
> for cleaning purposes, like prepping surfaces for thermal paste. Only
> boobs would pay super high prices for a solvent that works just as well
> but at 9 to 16 times less the cost when diluted. 100% IPA is purchased
> when using it to mix with other chemicals where water is undesirable,
> makes mixing calculations more difficult, or ends up having to use
> proportions that would generate a excessive quantity. Although 100% IPA
> is not sold in retail stores (because it won't sell at such high
> prices), it can be obtained via online order. The retail stores don't
> sell it online, again because of its high price, but chemical suppliers
> will sell it (usually to hospitals, or for chemical or industrial use).
> If they can make money, they'll sell it. Retail stores can't make money
> on 100% IPA on their shelves. And shops won't have 100% IPA, because
> they know it is cost prohibitive compared to 70% that is more than
> sufficient for the same task.
>
>> I use a good quality spray-can electrical contact cleaner that does not
>> melt nor fog plastic (and do not spray the screen with it, evar).
>
> Brand and product name of the contact cleaner?
>
> You could use, say, WD-40 Specialist Electrical Contact Cleaner Spray
> (this is NOT their WD-40 lubricant), but you're paying a far higher cost
> than needed (for the OP's job of cleaning the CPU and heatsink
> surfaces), plus you cannot use it for medicinal uses.
>
> https://files.wd40.com/pdf/sds/specialist/wd-40-specialist-electrical-contact-cleaner-spray-us-ghs.pdf
> Components:
> - Heptane
> - Isopropyl alcohol <--- Oooh, lookie, there's the IPA
> - Difluoroethane
> $19 USD for 12 oz spray can (far more expensive than 70% or 91% IPA)
>
> Heptane is used a non-polar solvent to dissolve adhesives, or other
> gooey substances, or in rubber cement because it evaporates quickly. It
> is the primary component of gasoline, and used to adjust the octane
> level (100% heptane has a value of zero in octane rating). Heptane is
> NOT needed to clean or dissolve thermal paste. You don't also need to
> get into tiny places using a straw attached to a spray can to clean
> thermal paste or prep the surfaces of a CPU and heatsink.
>
> Difluoroethane is the propellant used in aerosol sprays and gas duster
> cans, and often listed as R-152A (refrigerant-152A). Used as an
> alternative to CFCs, an ozone depletion potential is zero, and a short
> 1.4 year atmospheric lifetime.
>
> So, for thermal paste, the heptane is an irrelevant component, and it is
> the IPA that is doing the cleaning of the thermal paste. Maybe if you
> were to buy the CPU and heatsink at a garage sale might some boob have
> put stickers on the contact surfaces that you'd have to remove the
> sticker's adhesive, but IPA works on many adhesives, too.
>
> The advantage with a spray is you can get the straw into small openings
> to clean inside an assembly without having to dismantle, but you could
> also use a reusable pressure bottle in which you spray IPA. However,
> for the OP's task, you definitely do NOT want a spray. Contact cleaner
> spray is an example of a highly overpriced usable product, but used for
> the wrong job.
>

Here's not a bad price for 4 liters if you needed that much.

https://www.amazon.ca/ULTRA-PURE-Isopropyl-Alcohol-99-9-ANHYDROUS/dp/B079LPQMZ3/ref=sr_1_8?dchild=1&keywords=isopropyl+alcohol&qid=1631133235&sr=8-8

Rene

Rene Lamontagne wrote:
> On 2021-09-08 1:00 p.m., VanguardLH wrote:
>> Big Bad Bob <BigBadBob-at-mrp3-dot-com@testing.local> wrote:
>>
>>> Also you should use the purest form you can find. Typical drug store
>>> isoporpyl alcohol is 30% water and leaves a dusty film when it dries.
>>
>> Distilled water used for dilution does not leave a residue. They aren't
>> using tap water! Purity is mandatory for medical supplies. Do NOT use
>> denatured (ethanol + additives). Do NOT use rubbing alcohol as that may
>> be ethanol (grain alcohol aka ethyl rubbing alcohol) instead of
>> isopropanol, and often has additives, like mint, wintergreen, or other
>> scented oil. 100% IPA is fine, but a waste of money over 70% IPA unless
>> you happen to find a seller charging the same price for both (unlikely).
>>
>> Here, at Walgreens pharmacy, prices are for 16 oz. bottles:
>> 70% isopropyl alcohol = $2.19 USD
>> 91% isopropyl alcohol = $2.99 USD
>>
>> Here in the USA, both dilutions are "typical drug store" potencies.
>> Just now they happen to have a sale on the 91% for $0.99, and even
>> better is a "buy 1, get 1 for 50% off". I'll stop by to see if they
>> still have some. Even if it were for 70%, that's a good sale, and I'd
>> get some of that. Whether 70% or 91%, both are effective for cleaning
>> away thermal paste without leaving a residue (as long as you thoroughly
>> clean away the paste obviously), or prepping surfaces before applying
>> thermal paste.
>>
>>>> Well, I've called in Currys/ PC World, Boots, Superdrug, Asda and a
>>>> local PC repair shop; and not a one has any. There are lots of brands
>>>> available on Amazon and ebay, however.
>>
>> Something strange about availability restriction in the UK. In the USA,
>> we can get 70%, and often 91%, anywhere that sells first aid products.
>> The 99% to 100% varieties are just too expensive ($19 to $32 USD for 16
>> oz bottle) to sell in retail stores. 100% IPA isn't in retail stores
>> because it would never sell. No consumer needs that potency, not even
>> for cleaning purposes, like prepping surfaces for thermal paste. Only
>> boobs would pay super high prices for a solvent that works just as well
>> but at 9 to 16 times less the cost when diluted. 100% IPA is purchased
>> when using it to mix with other chemicals where water is undesirable,
>> makes mixing calculations more difficult, or ends up having to use
>> proportions that would generate a excessive quantity. Although 100% IPA
>> is not sold in retail stores (because it won't sell at such high
>> prices), it can be obtained via online order. The retail stores don't
>> sell it online, again because of its high price, but chemical suppliers
>> will sell it (usually to hospitals, or for chemical or industrial use).
>> If they can make money, they'll sell it. Retail stores can't make money
>> on 100% IPA on their shelves. And shops won't have 100% IPA, because
>> they know it is cost prohibitive compared to 70% that is more than
>> sufficient for the same task.
>>
>>> I use a good quality spray-can electrical contact cleaner that does not
>>> melt nor fog plastic (and do not spray the screen with it, evar).
>>
>> Brand and product name of the contact cleaner?
>>
>> You could use, say, WD-40 Specialist Electrical Contact Cleaner Spray
>> (this is NOT their WD-40 lubricant), but you're paying a far higher cost
>> than needed (for the OP's job of cleaning the CPU and heatsink
>> surfaces), plus you cannot use it for medicinal uses.
>>
>> https://files.wd40.com/pdf/sds/specialist/wd-40-specialist-electrical-contact-cleaner-spray-us-ghs.pdf
>>
>> Components:
>> - Heptane
>> - Isopropyl alcohol <--- Oooh, lookie, there's the IPA
>> - Difluoroethane
>> $19 USD for 12 oz spray can (far more expensive than 70% or 91% IPA)
>>
>> Heptane is used a non-polar solvent to dissolve adhesives, or other
>> gooey substances, or in rubber cement because it evaporates quickly. It
>> is the primary component of gasoline, and used to adjust the octane
>> level (100% heptane has a value of zero in octane rating). Heptane is
>> NOT needed to clean or dissolve thermal paste. You don't also need to
>> get into tiny places using a straw attached to a spray can to clean
>> thermal paste or prep the surfaces of a CPU and heatsink.
>>
>> Difluoroethane is the propellant used in aerosol sprays and gas duster
>> cans, and often listed as R-152A (refrigerant-152A). Used as an
>> alternative to CFCs, an ozone depletion potential is zero, and a short
>> 1.4 year atmospheric lifetime.
>>
>> So, for thermal paste, the heptane is an irrelevant component, and it is
>> the IPA that is doing the cleaning of the thermal paste. Maybe if you
>> were to buy the CPU and heatsink at a garage sale might some boob have
>> put stickers on the contact surfaces that you'd have to remove the
>> sticker's adhesive, but IPA works on many adhesives, too.
>>
>> The advantage with a spray is you can get the straw into small openings
>> to clean inside an assembly without having to dismantle, but you could
>> also use a reusable pressure bottle in which you spray IPA. However,
>> for the OP's task, you definitely do NOT want a spray. Contact cleaner
>> spray is an example of a highly overpriced usable product, but used for
>> the wrong job.
>>
>
> Here's not a bad price for 4 liters if you needed that much.
>
> https://www.amazon.ca/ULTRA-PURE-Isopropyl-Alcohol-99-9-ANHYDROUS/dp/B079LPQMZ3/ref=sr_1_8?dchild=1&keywords=isopropyl+alcohol&qid=1631133235&sr=8-8
>
>
> Rene

Read the comment section though.

One person says it smells like mothballs (Para-dichlorobenzene)
when it evaporates. That suggests it is co-distilled
with something. Not likely to be for rubbing
on skin.

And isn't that the beauty of bazaar shopping ?

You can get anything you want, whether it is
good or bad for you.

Paul

Rene Lamontagne <rlamont@shaw.ca> wrote:

> Here's not a bad price for 4 liters if you needed that much.
> https://www.amazon.ca/ULTRA-PURE-Isopropyl-Alcohol-99-9-ANHYDROUS/dp/B079LPQMZ3/ref=sr_1_8?dchild=1&keywords=isopropyl+alcohol&qid=1631133235&sr=8-8

Price: $27.50

The same seller has 70% IPA at $19.99.
https://www.amazon.ca/Ultra-Pure-Isopropyl-Alcohol-Litre/dp/B08KLJ4S8J/

Be sure to add in the shipping cost. For those that extol themselves as
Amazon Prime customers with zero shipping costs, remember to proportion
your monthly subscription cost ($8 CDN per month) across all your
purchases for a month.

Hmm, that seller ships from Canada. What's the international shipping
cost from there to the UK? Didn't remember (and didn't bother to
revisit the old posts) if you're in Canada or UK.

On 2021-09-08 8:14 p.m., VanguardLH wrote:
> Rene Lamontagne <rlamont@shaw.ca> wrote:
>
>> Here's not a bad price for 4 liters if you needed that much.
>> https://www.amazon.ca/ULTRA-PURE-Isopropyl-Alcohol-99-9-ANHYDROUS/dp/B079LPQMZ3/ref=sr_1_8?dchild=1&keywords=isopropyl+alcohol&qid=1631133235&sr=8-8
>
> Price: $27.50
>
> The same seller has 70% IPA at $19.99.
> https://www.amazon.ca/Ultra-Pure-Isopropyl-Alcohol-Litre/dp/B08KLJ4S8J/
>
> Be sure to add in the shipping cost. For those that extol themselves as
> Amazon Prime customers with zero shipping costs, remember to proportion
> your monthly subscription cost ($8 CDN per month) across all your
> purchases for a month.
>
> Hmm, that seller ships from Canada. What's the international shipping
> cost from there to the UK? Didn't remember (and didn't bother to
> revisit the old posts) if you're in Canada or UK.
>

Of course I was just window shopping as I don't need any IPA, I still
have half a 16 oz bottle of 99% bought years ago, I use 70% for most
cleaning and disinfecting.
Yes, I am on Amazon prime and factor in the subscription costs which
averages to roughly $2 per order, not even counting all the movies
which we watch.
Yes I live in Canada, Winnipeg, MB to be precise. :-)

Rene

Paul <nospam@needed.invalid> wrote:

> Rene Lamontagne wrote:
>
>> Here's not a bad price for 4 liters if you needed that much.
>> https://www.amazon.ca/ULTRA-PURE-Isopropyl-Alcohol-99-9-ANHYDROUS/dp/B079LPQMZ3/ref=sr_1_8?dchild=1&keywords=isopropyl+alcohol&qid=1631133235&sr=8-8
>
> Read the comment section though.
>
> One person says it smells like mothballs (Para-dichlorobenzene) when
> it evaporates. That suggests it is co-distilled with something. Not
> likely to be for rubbing on skin.

The reviewer noting the mothballs scent is mixing 99% IPA with some
unidentified oils to produce some chemical mixture ("my oils smelt like
mothballs"). Well, obviously this reviewer wasn't reviewing the
product, but his unreported use of it. Also, no mention by that
reviewer if the replacement product that worked for him was at also at
99%, or something less. I don't trust that reviewer.

Couldn't find an online MSDS (Material Safety Data Sheet) on the
Dustronics produt to see what they say is in their product.

Does Amazon resell opened goods as new? One reviewer noted the bottle
wasn't sealed. I don't see that happening if the bottle were shipped
direct from Dustronics, but could happened on a resold returned item.

No where at their web site do they claim them manufacture the IPA, so
they might be just a reseller. Dustronics claims they are a licensed
business in Canada. Is there a Canadian gov't site where you can lookup
business licenses to see if Dustronics is licensed to manufacture IPA?

The amazon.ca ad didn't mention returns. Also, no mention of who is the
shipper. Since IPA (even at 70%) is flammable, shipping would require a
shipper that accepts hazardous materials.

https://dustronics.com/i-learn
"Technical grade"

Seems odd they don't declare medical grade, but the page also says IPA
purity is 99.953% leaving only 0.047% for impurities. If they are a
reseller, they're just regurgitating the specs they got from their
supplier.

VanguardLH wrote:
> Paul <nospam@needed.invalid> wrote:
>
>> Rene Lamontagne wrote:
>>
>>> Here's not a bad price for 4 liters if you needed that much.
>>> https://www.amazon.ca/ULTRA-PURE-Isopropyl-Alcohol-99-9-ANHYDROUS/dp/B079LPQMZ3/ref=sr_1_8?dchild=1&keywords=isopropyl+alcohol&qid=1631133235&sr=8-8
>> Read the comment section though.
>>
>> One person says it smells like mothballs (Para-dichlorobenzene) when
>> it evaporates. That suggests it is co-distilled with something. Not
>> likely to be for rubbing on skin.
>
> The reviewer noting the mothballs scent is mixing 99% IPA with some
> unidentified oils to produce some chemical mixture ("my oils smelt like
> mothballs"). Well, obviously this reviewer wasn't reviewing the
> product, but his unreported use of it. Also, no mention by that
> reviewer if the replacement product that worked for him was at also at
> 99%, or something less. I don't trust that reviewer.
>
> Couldn't find an online MSDS (Material Safety Data Sheet) on the
> Dustronics produt to see what they say is in their product.
>
> Does Amazon resell opened goods as new? One reviewer noted the bottle
> wasn't sealed. I don't see that happening if the bottle were shipped
> direct from Dustronics, but could happened on a resold returned item.
>
> No where at their web site do they claim them manufacture the IPA, so
> they might be just a reseller. Dustronics claims they are a licensed
> business in Canada. Is there a Canadian gov't site where you can lookup
> business licenses to see if Dustronics is licensed to manufacture IPA?
>
> The amazon.ca ad didn't mention returns. Also, no mention of who is the
> shipper. Since IPA (even at 70%) is flammable, shipping would require a
> shipper that accepts hazardous materials.
>
> https://dustronics.com/i-learn
> "Technical grade"
>
> Seems odd they don't declare medical grade, but the page also says IPA
> purity is 99.953% leaving only 0.047% for impurities. If they are a
> reseller, they're just regurgitating the specs they got from their
> supplier.

https://www.labmanager.com/business-management/the-seven-most-common-grades-for-chemicals-and-reagents-2655

ACS grade meets or exceeds purity standards set by the
American Chemical Society (ACS). This grade is acceptable
for food, drug, or medicinal use and can be used for ACS
applications or for general procedures that require stringent
quality specifications and a purity of >=95%.

Reagent grade is generally equal to ACS grade (>=95%) and is acceptable
for food, drug, or medicinal use and is suitable for use in many
laboratory and analytical applications.

USP grade meets or exceeds requirements of the United States Pharmacopeia
(USP). This grade is acceptable for food, drug, or medicinal use.
It is also used for most laboratory purposes, but the USP being
followed should always be reviewed prior to beginning to ensure
the grade is appropriate for that methodology.

NF grade meets or exceeds requirements of the National Formulary (NF).
The USP and the NF (USP-NF) jointly publish a book of public
pharmacopeial standards for chemical and biological drug substances,
dosage forms, compounded preparations, excipients, medical devices,
and dietary supplements. The listings here should be reviewed to
determine which would be considered equivalent grades.

Laboratory grade is the most popular grade for use in educational
applications, but its exact levels of impurities are unknown. While
excellent for teaching and training, it is not pure enough to be
offered for food, drug, or medicinal use of any kind.

Purified grade, also called pure or practical grade, meets no official
standard; it is not pure enough to be offered for food, drug, or
medicinal use of any kind.

==>Technical grade is used for commercial and industrial purposes; however,
like many others, it is not pure enough to be offered for food, drug,
or medicinal use of any kind.

So that Amazon product really isn't suited for rubbing on yourself.
It might be OK, but it hasn't been tested.

Now, I like the table here, because it has some specs.

https://high-techconversions.com/different-types-isopropyl-alcohol/

"USP (Medical Grade) >99.0% <2ppm benzene & related substance"

Now we know what it's co-distilled with,
the stuff we buy at the drug store! That
benzene didn't get in there when the alcohol
was manufactured.

The ACS grade happens to mention some trace elements
that are probably there from when the isopropyl
was manufactured, versus giving us details on
the distillation. The "total weight" of impurities
tells you there are other items of some sort (mostly water).
But the Non Volatile Residue is listed as 0.00%,
so there are no pigeon feathers or rat poop in it :-)
And at $132 for a 4 liter bottle, there better not be.

That's what I liked about ACS grade - any time the topic
came up, there was always grumbling about the price. It
doesn't really matter what is in the bottle, it always
seems to be $80+. I guess $132 is the "new normal" then.

Paul

VanguardLH wrote:
> Rene Lamontagne <rlamont@shaw.ca> wrote:
>
>> Here's not a bad price for 4 liters if you needed that much.
>> https://www.amazon.ca/ULTRA-PURE-Isopropyl-Alcohol-99-9-ANHYDROUS/dp/B079LPQMZ3/ref=sr_1_8?dchild=1&keywords=isopropyl+alcohol&qid=1631133235&sr=8-8
>
> Price: $27.50
>
> The same seller has 70% IPA at $19.99.
> https://www.amazon.ca/Ultra-Pure-Isopropyl-Alcohol-Litre/dp/B08KLJ4S8J/
>
> Be sure to add in the shipping cost. For those that extol themselves as
> Amazon Prime customers with zero shipping costs, remember to proportion
> your monthly subscription cost ($8 CDN per month) across all your
> purchases for a month.
>
> Hmm, that seller ships from Canada. What's the international shipping
> cost from there to the UK? Didn't remember (and didn't bother to
> revisit the old posts) if you're in Canada or UK.
>

I got 100ml in a plastic bottle, rectangular and slim enough for the
postman to push it through my letter-box while I was out.
UK company, free postage, 2 day delivery time;
https://www.ebay.co.uk/itm/313045423768

Ed

Ed Cryer <ed@somewhere.in.the.uk> wrote:

> I got 100ml in a plastic bottle, rectangular and slim enough for the
> postman to push it through my letter-box while I was out.
> UK company, free postage, 2 day delivery time;
> https://www.ebay.co.uk/itm/313045423768

If the UK postal service delivered the package, the seller lied to them
about the contents.

https://www.postoffice.co.uk/mail/what-can-i-send
or
https://www.royalmail.com/sites/default/files/royal-mail-prohibited-and-restricted-items-nov-23-2018---23410530.pdf
Section: Flammable liquids

But then I found:

https://www.centralmailing.co.uk/blog/royal-mail-relaxes-rules-on-posting-alcohol-and-perfume/
but with do date stamp which is typical of blogs presenting themselves
as news sources. Without a date stamp, such blogs are worthless and
often misleading. I suspect the article came out after the Covid19
panedemic got declared, and is to accomodate shipping of disinfectant,
hand sanitizers, and other antiseptic chemicals.

That article says IPA to 70% is allowed, not the 99% you got. Per:

https://www.royalmail.com/sites/royalmail.com/files/2021-07/royal-mail-prohibited-and-restricted-items-july-2021.pdf

IPA being a flammable is not allowed for UK or international delivery.
There might be Covid19 relaxations, but too often those aren't published
(unless you know the legal override regulation or code number).

VanguardLH wrote:
> Ed Cryer <ed@somewhere.in.the.uk> wrote:
>
>> I got 100ml in a plastic bottle, rectangular and slim enough for the
>> postman to push it through my letter-box while I was out.
>> UK company, free postage, 2 day delivery time;
>> https://www.ebay.co.uk/itm/313045423768
>
> If the UK postal service delivered the package, the seller lied to them
> about the contents.
>
> https://www.postoffice.co.uk/mail/what-can-i-send
> or
> https://www.royalmail.com/sites/default/files/royal-mail-prohibited-and-restricted-items-nov-23-2018---23410530.pdf
> Section: Flammable liquids
>
> But then I found:
>
> https://www.centralmailing.co.uk/blog/royal-mail-relaxes-rules-on-posting-alcohol-and-perfume/
> but with do date stamp which is typical of blogs presenting themselves
> as news sources. Without a date stamp, such blogs are worthless and
> often misleading. I suspect the article came out after the Covid19
> panedemic got declared, and is to accomodate shipping of disinfectant,
> hand sanitizers, and other antiseptic chemicals.
>
> That article says IPA to 70% is allowed, not the 99% you got. Per:
>
> https://www.royalmail.com/sites/royalmail.com/files/2021-07/royal-mail-prohibited-and-restricted-items-july-2021.pdf
>
> IPA being a flammable is not allowed for UK or international delivery.
> There might be Covid19 relaxations, but too often those aren't published
> (unless you know the legal override regulation or code number).
>

Blimey! No wonder the repair guys I talked to use aftershave, perfume
spray and WD40! IPA seems to have gone black-market here.

I have a bottle in the cupboard. Unused so far, since I cleaned the
assembly with a fine-bristle paintbrush and the hand attachment of my
vacuum cleaner. The amount of dust that came out through the fan blades
was immense, and I got all in view out. I don't know if there's still
some in the heatsink blades, but I've been monitoring the temperature
since, and it's not risen above 45°.

Ed

Andy Burns <usenet@andyburns.uk> wrote:
> VanguardLH wrote:
>
>> Something strange about availability restriction in the UK.
>
>
> I don't believe there are any such restrictions, I suspect (like many
> things) it has fallen down the following loop

Yep. The last time I needed to use some was to clean the heads on my tape
deck. That was a long time ago.

On Wed, 8 Sep 2021 20:44:36 -0500, VanguardLH <V@nguard.LH> wrote:

>Does Amazon resell opened goods as new?

Not as a general policy, but I suppose something could slip through.
Instead, they tend to fill a 1-cubic yard box with as much random crap as
possible, then sell the entire lot dirt cheap. Buyers have no idea what
might be in the box until they receive it and take a look. I've seen many
such unboxing videos on Youtube. Sometimes the buyer is pleasantly
surprised; other times not.

On 9/15/2021 2:02 PM, Char Jackson wrote:
> On Wed, 8 Sep 2021 20:44:36 -0500, VanguardLH <V@nguard.LH> wrote:
>
>>Does Amazon resell opened goods as new?
>
> Not as a general policy, but I suppose something could slip through.
> Instead, they tend to fill a 1-cubic yard box with as much random crap as
> possible, then sell the entire lot dirt cheap. Buyers have no idea what
> might be in the box until they receive it and take a look. I've seen many
> such unboxing videos on Youtube. Sometimes the buyer is pleasantly
> surprised; other times not.

I just had an amazingly surprising experience with Amazon.

I ordered something from their web site (about $80).

It was less than an hour later that I realized I had made a mistake and
didn't need it. I called Amazon to cancel, and they told it was sold by
a third-party vendor and it had already been shipped.

However they accepted the cancellation and told me they would credit my
account for the $80 cost, but when I received the item I did *not* need
to send it back; I should just keep it.

--
Ken

Ken Blake wrote:
> On 9/15/2021 2:02 PM, Char Jackson wrote:
>> On Wed, 8 Sep 2021 20:44:36 -0500, VanguardLH <V@nguard.LH> wrote:
>>
>>> Does Amazon resell opened goods as new?
>>
>> Not as a general policy, but I suppose something could slip through.
>> Instead, they tend to fill a 1-cubic yard box with as much random crap as
>> possible, then sell the entire lot dirt cheap. Buyers have no idea what
>> might be in the box until they receive it and take a look. I've seen many
>> such unboxing videos on Youtube. Sometimes the buyer is pleasantly
>> surprised; other times not.
>
>
> I just had an amazingly surprising experience with Amazon.
>
> I ordered something from their web site (about $80).
>
> It was less than an hour later that I realized I had made a mistake and
> didn't need it. I called Amazon to cancel, and they told it was sold by a
> third-party vendor and it had already been shipped.
>
> However they accepted the cancellation and told me they would credit my
> account for the $80 cost, but when I received the item I did *not* need to
> send it back; I should just keep it.
>
Not uncommon and policy for some time.
In 2019 bought a $120 BOOS Bread board on Amazon that was fulfilled by a
3rd party vendor.
The board had a corner with a 1/2" chip/chunk broken off.
Contacted Amazon, they sent a replacement. During the initial
complaint/contact also was instructed to not return the item.
Sanded the rough edge smooth and donated it to the church kitchen.

I asked, and they said cost to process the return for the labor and
expense is greater than the route for the vendor and/or shipper.

--
....w¡ñ§±¤n