ANSI PH4.277-1980
Photographic Grade Potassium Metabisulfite, K2S2O5

Standard No.

ANSI PH4.277-1980

Release Date

1980

Published By

American National Standards Institute （ANSI)

Latest

ANSI PH4.277-1980

Scope

Establishes criteria for the purity of photographic grade potassium metabisulfite and describes the tests to be used to determine the purity.

ANSI PH4.277-1980 history

• 1980 ANSI PH4.277-1980 Photographic Grade Potassium Metabisulfite, K2S2O5