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Cheapest way to make up to 99% pure isopropanol
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Nusa:

--- Quote from: Smoky on July 20, 2019, 03:26:16 am ---This stuff works very well. I bought it on Ebay. It's $8 for one gallon, you get four quarts. $12 to ship :)

It works very well and leaves no residue.

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But most of the cleaning I do when soldering is Dupont 105 lacquer thinner. I have a five gallon can in the garage!

--- End quote ---

I agree, it's both easier AND cheaper to buy better qualtiy iso in the first place than to concentrate it yourself.

I looked it up, and Dupont 105 is hazardous stuff. You don't want to be touching or breathing it. So pay attention to protection and ventilation if you use it.

CAS-No. Chemical name Concentration
67-56-1 Methyl alcohol 50%
108-88-3 Toluene 19%
67-64-1 Acetone 15 - 26%
1330-20-7 Xylene 8%
100-41-4 Ethylbenzene 2.0%
8032-32-4 Vm&p naphtha 1 - 4%
Beamin:

--- Quote from: Smoky on July 20, 2019, 03:26:16 am ---This stuff works very well. I bought it on Ebay. It's $8 for one gallon, you get four quarts. $12 to ship :)

It works very well and leaves no residue.

(Attachment Link)

But most of the cleaning I do when soldering is Dupont 105 lacquer thinner. I have a five gallon can in the garage!

--- End quote ---

Is that really dry alcohol? Most is 98% because as soon as you open it the humidity gets into it. Dupont 105: is the 105 for all the different kinds of cancer it gives you?

I just leave the flux on it adds character to my boards.
Smoky:
I pour a small amount of I-Max in a PPG mixing cup and use a trimmed China bristle brush to clean.

I do the same with the lacquer thinner but I keep that in a squirt bottle.

I've sprayed, Dupont, PPG, Standox, and Sikkens auto refinish products for about 38 years.

While in the Marines, we went through barrels of dry cleaning fluid to clean rifles and machine guns. Why don't you go check that stuff out?

I know what to use in my new electronics hobby.
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