[time-nuts] LCD display connector

gary lists at lazygranch.com
Tue Jan 4 04:31:56 UTC 2011

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
> lists at lazygranch.com 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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