They mix in stuff like wintergreen oil. The FDA doesn't have an issue
with so-called inert ingredients. Inert for use on the body, not inert
in electronics or optics. Most prescription drugs are full of inert
materials. They don't have to be listed.
Generally you need reagent grade to get something pure. When you do
chemistry, you need to know exactly what you are using. Surprises are
not cool in chemistry. There are even grades of reagent grade.
There is plenty of stuff on the denaturing chemicals on the net, though
it has long been known in the industry that drug store alcohol off the
shelf isn't suitable for electronics or optics.
On 1/3/2011 7:13 PM, Chuck Harris wrote:
Actually, no, it doesn't. The FDA would require them to call it
something else,
and the extra ingredients would have to be on the label. If they call it
isopropyl
alcohol, it contains alcohol, and water in various percentages.
Isopropyl is readily available in 70%, 91%, and 99%. I would recommend
either the 91%, or the 99%.
-Chuck Harris
[email protected] wrote:
Most drug store isopropal contain other chemicals to keep your skin
from drying out. You can buy electronics grade
isopropal. Cheap enough ($5 for a large bottle) if you have a store
that stocks it. Fry's Electronics has it.
Of course grain alcohol will do the job.
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