ANSI PH4.275-1980
Photographic Grade Sodium Sulfite, Anhydrous, Na2 SO3

Standard No.

ANSI PH4.275-1980

Release Date

1980

Published By

American National Standards Institute （ANSI)

Latest

ANSI PH4.275-1980

Scope

Establishes criteria for the purity of photographic-grade anhydrous sodium sulfite, and describes the tests to be used to determine the purity.

ANSI PH4.275-1980 history

• 1980 ANSI PH4.275-1980 Photographic Grade Sodium Sulfite, Anhydrous, Na2 SO3