Phone: (011) 7541-421, 3409-301, 3409-335, 6547-293, 3409-310
E-mail: Standards sales: prodaja@iss.rs Education: iss-edukacija@iss.rs Information about standards: infocentar@iss.rs
Stevana Brakusa 2, 11030 Beograd
Main menu

ISO 423:1994

Photography — Processing chemicals — Specifications for hydroquinone

Apr 21, 1994

General information

90.93     Jun 6, 2026

ISO

ISO/TC 42

International Standard

37.040.30  

French   English  

Buying

Published

Language in which you want to receive the document.

Scope

Establishes criteria for the purity and describes the test methods for identity tests, residue after ignition, heavy metals content, iron content, appearance of solution. Annex A describes preparation of the standard ammonium cerium(IV) hexanitrate solution.

Life cycle

PREVIOUSLY

WITHDRAWN
ISO 423:1976

NOW

PUBLISHED
ISO 423:1994
90.93 Standard confirmed
Jun 6, 2026