In one of the posts about solder, somebody mentioned CVS Drug Store for
91% isopropyl alcohol.

I just called a CVS, it's $2.79 for 16 ounces and $2.99 for 32 ounces.
That's 20 cents more for double the 16 ounce size. (This is in southern
California).


A mildly related question: In thinking about other uses for rosin, it
occurred to me that I haven't seen any pitchers using a rosin bag for
years.

Maybe it went the way of the vanishing caboose.

--- Joe

I just called a CVS, it's $2.79 for 16 ounces and $2.99
for 32 ounces. That's 20 cents more for double the
16 ounce size. (This is in southern California).

Even the quart size is overpriced. If you're willing to wait for a sale, you
should pay no more than about $1 per pint.


A mildly related question: In thinking about other uses
for rosin, it occurred to me that I haven't seen any pitchers
using a rosin bag for years.

I can just see a pitcher tossing a roll of solder at the batter. grin

"Joe" wrote in message
...
In one of the posts about solder, somebody mentioned CVS Drug Store for
91% isopropyl alcohol.

I just called a CVS, it's $2.79 for 16 ounces and $2.99 for 32 ounces.
That's 20 cents more for double the 16 ounce size. (This is in southern
California).


A mildly related question: In thinking about other uses for rosin, it
occurred to me that I haven't seen any pitchers using a rosin bag for
years.

Maybe it went the way of the vanishing caboose.

--- Joe

91% IPA is not usually considered to be 'electronics grade', which should be
99.7% minimum. It's also not the most appropriate stuff for cleaning a lot
of flux, which requires a proper defluxing agent such as Electrolube Deflux
160

Arfa

On Mon, 26 Jul 2010 17:57:25 +0100, Arfa Daily wrote:

"Joe" wrote in message

...
In one of the posts about solder, somebody mentioned CVS Drug Store for
91% isopropyl alcohol.

I just called a CVS, it's $2.79 for 16 ounces and $2.99 for 32 ounces.
That's 20 cents more for double the 16 ounce size. (This is in southern
California).


A mildly related question: In thinking about other uses for rosin, it
occurred to me that I haven't seen any pitchers using a rosin bag for
years.

Maybe it went the way of the vanishing caboose.

--- Joe

91% IPA is not usually considered to be 'electronics grade', which
should be 99.7% minimum. It's also not the most appropriate stuff for
cleaning a lot of flux, which requires a proper defluxing agent such as
Electrolube Deflux 160

Arfa

91 leaves a bit of residue in certain cases. After reading the
ingredients on a can of Flux-Off spray flux stripper I thought why not
just use 91 isoprop. It usually does work in conjunction with a
toothbrush. But like I said can leave a residue.

On 7/26/2010 10:30 AM Meat Plow spake thus:

On Mon, 26 Jul 2010 17:57:25 +0100, Arfa Daily wrote:

"Joe" wrote in message
...

In one of the posts about solder, somebody mentioned CVS Drug Store for
91% isopropyl alcohol.

I just called a CVS, it's $2.79 for 16 ounces and $2.99 for 32 ounces.
That's 20 cents more for double the 16 ounce size. (This is in southern
California).

91% IPA is not usually considered to be 'electronics grade', which
should be 99.7% minimum. It's also not the most appropriate stuff for
cleaning a lot of flux, which requires a proper defluxing agent such as
Electrolube Deflux 160

91 leaves a bit of residue in certain cases. After reading the
ingredients on a can of Flux-Off spray flux stripper I thought why not
just use 91 isoprop. It usually does work in conjunction with a
toothbrush. But like I said can leave a residue.

Why mess around with isopropyl alcohol at all, since all of it contains
*some* water? Use denatured alcohol (methanol) instead, in a
tightly-capped container to guard against absorbing moisture.


--
The fashion in killing has an insouciant, flirty style this spring,
with the flaunting of well-defined muscle, wrapped in flags.

- Comment from an article on Antiwar.com (http://antiwar.com)

In article , David Nebenzahl wrote:
On 7/26/2010 10:30 AM Meat Plow spake thus:

On Mon, 26 Jul 2010 17:57:25 +0100, Arfa Daily wrote:

"Joe" wrote in message

...

In one of the posts about solder, somebody mentioned CVS Drug Store for
91% isopropyl alcohol.

I just called a CVS, it's $2.79 for 16 ounces and $2.99 for 32 ounces.
That's 20 cents more for double the 16 ounce size. (This is in southern
California).

91% IPA is not usually considered to be 'electronics grade', which
should be 99.7% minimum. It's also not the most appropriate stuff for
cleaning a lot of flux, which requires a proper defluxing agent such as
Electrolube Deflux 160

91 leaves a bit of residue in certain cases. After reading the
ingredients on a can of Flux-Off spray flux stripper I thought why not
just use 91 isoprop. It usually does work in conjunction with a
toothbrush. But like I said can leave a residue.

Why mess around with isopropyl alcohol at all, since all of it contains
*some* water? Use denatured alcohol (methanol) instead, in a
tightly-capped container to guard against absorbing moisture.


That would be fine if you used it in ZERO humidity.
Its not worth the trouble using 99.99%
95% is a very good figure. I actually use the NON-denatured stuff.
I don't buy it, but the medical labs buy it.. Its safer than 99%
stuff due to dryers contamination as far as drinking. The
The denatured stuff probably has more residue.

Seems to me methanol has the ability to harm some materials
its used on.


I also have a 4L bottle of isoproypal 99.5% .001% residue
which is nice. I will ALWAYS have water on the board
after cleaning just from room humidity. I usually take
a hot air gun or pistol to heat dry the board
or put it under an incandesant light bulb.

A possible source for cleaning boards, gas tank alcohol, "dry gas"
probably mostly isopropal alcohol, probably 98% or better.

greg

GregS wrote:

95% is a very good figure. I actually use the NON-denatured stuff.

How about the drinking stuff? (95% "grain" alcohol).

Here I can by a "fifth" (750ml) for less than 250ml of 70% Isopropyl.

Geoff.

--
Geoffrey S. Mendelson N3OWJ/4X1GM
To help restaurants, as part of the "stimulus package", everyone must order
dessert. As part of the socialized health plan, you are forbidden to eat it. :-)

David Nebenzahl wrote:

Why mess around with isopropyl alcohol at all, since all of it
contains *some* water? Use denatured alcohol (methanol) instead, in a
tightly-capped container to guard against absorbing moisture.

Perhaps it is different where you live, but here in the US, denatured
alcohol is not methanol; it is, instead, ethanol with a denaturant added.
The denaturant can be methanol, or it can be any number of other chemicals,
so long as it is sufficiently adulterated to prevent a person from using it
for ingestion.

Jon

In the US, denatured alcohol is not methanol; it's ethanol
with a denaturant. The denaturant can be methanol, or
a number of other chemicals, as long as it's sufficiently
adulterated to prevent a person from using it for ingestion.

"using it for ingestion" = "drinking it" You will soon be visited by
Jacques Barzun and put to death in a most unpleasant manner.

Methanol is wood alcohol. It _is_ drinkable -- but poisonous. Among other
things, it causes blindness.

I've never tasted denatured alcohol -- a few drops are harmless -- so I
don't understand why denatured alcohol is "undrinkable".

On Mon, 26 Jul 2010 22:30:29 -0700, "Jon Danniken"
wrote:

David Nebenzahl wrote:

Why mess around with isopropyl alcohol at all, since all of it
contains *some* water? Use denatured alcohol (methanol) instead, in a
tightly-capped container to guard against absorbing moisture.

Perhaps it is different where you live, but here in the US, denatured
alcohol is not methanol; it is, instead, ethanol with a denaturant added.
The denaturant can be methanol, or it can be any number of other chemicals,
so long as it is sufficiently adulterated to prevent a person from using it
for ingestion.

Right. Methanol is a very poor denaturant. The idea is to make it
undrinkable, not lethal. Someone ralfing their guts out for an hour is
cheaper than blindness or death. Now, Sterno...