As a former chemist, let me offer a few suggestions to those using
glacial acetic acid:
1. Do *not* store it outside. The stuff can freeze solid -- that's
why it's called "glacial" acetic acid. ISTR that its freezing point
is slightly above 0C (32F).
2. Do not store it inside. The stuff has no business being in a
residence or workplace lest it spill.
3. When diluting it, do so outside if at all possible. A chemist in a
laboratory will do so in a fume hood. You want the best possible
ventilation with this stuff.
4. Acetic acid is cheap. White pickling vinegar is about 7% solution.
The cost savings of buying glacial acetic acid and diluting it
yourself isn't worth the hazards its use involves.
5. If you are still insistent on using glacial acetic acid, see if
you can use lab facilities at your local high school or university to
do the dilution under proper conditions with a fume hood and an
emergency shower, as well as storing it there with proper
ventilation.
--
Rodger Whitlock
Victoria, British Columbia, Canada
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