formaldehyde
A very reactive aldehyde (HCHO), that is a
colorless, pungent, irritating, combustible gas
when pure, but is conveniently handled in the form
of aqueous solutions or solid polymers. It is
usually prepared by the oxidation of methanol or
gaseous hydrocarbons. It has been used to kill, or
inhibit, bookworms, and is used in the manufacture
of some leathers, in the treatment of certain
dyestuffs to render them fast to washing, and for
bleaching archival papers. Its tanning properties
stem from its ability to render gelatin insoluble
in water. See also:ALDEHYDE TANNING ; COMBINATION OIL
TANNAGE ; FORMALIN .
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