solvents from Wal-Mart
Alcohol from Wal-Mart? When all else fails, read the label, which should
state whether the alcohol is 95% or absolute alcohol.
There is no single "denatured" alcohol - there are at least 40 denaturing
formulas approved by - I think it's the Bureau of Alcohol, Tobacco, and
Firearms (Treasury) - with everything from poisons to bad smells to yucky
looking dyes. The "reagent alcohol" commonly used in histology is S3DA
modified (90% ethanol, 5% methanol, 5% isopropanol), with denaturation with
methyl isobutyl ketone (MIBK) also used (acceptable if you can stand the
smell). Alcohol denatured with acetone is unsuitable for histologic purposes.
"Rubbing alcohol" is usually 70% isopropanol, 30% water.
Alcohol from the liquor store? That's going to be 95%, and you have to pay
the very high beverage alcohol tax on it. (A few labs use pure ethanol, and
are required to maintain security procedures and to undergo BATF inspections.
The hospital pharmacy needs a large secure storage space to make this
Xylene at Lowe's? I don't know anything about specifying xylene.
We pay inflated prices for ordinary products when we use them in the health
care world. Circumventing this mark-up by buying industrial solvents may be
the wave of the future. Meticulous specification of standards is the only way
labs can defend themselves from real trouble here.
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