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ISO 422:1994

Photography — Processing chemicals — Specifications for p-methylaminophenol sulfate

Publication date:   Oct 20, 1994

General information

90.93   Standard confirmed   Jun 6, 2026

ISO

ISO/TC 42 Photography

International Standard

37.040.30   Photographic chemicals

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Scope

Cancels and replaces the first edition (1976). Lays down criteria for the purity of photographic-grade p-methylaminophenol sulfate and specifies the test methods to be used to determine the purity.

Life cycle

PREVIOUSLY

WITHDRAWN
ISO 422:1976

NOW

PUBLISHED
ISO 422:1994
90.93 Standard confirmed
Jun 6, 2026