ANSI PH4.227-1981
Photographic Grade Sodium Carbonate, Monohydrate and Sodium Carbonate, Anhydrous

Standard No.

ANSI PH4.227-1981

Release Date

1981

Published By

American National Standards Institute （ANSI)

Latest

ANSI PH4.227-1981

Scope

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

ANSI PH4.227-1981 history

• 1981 ANSI PH4.227-1981 Photographic Grade Sodium Carbonate, Monohydrate and Sodium Carbonate, Anhydrous