ISO 17234-2:2011

Leather — Chemical tests for the determination of certain azo colorants in dyed leathers — Part 2: Determination of 4-aminoazobenzene

Publication date:   Mar 10, 2011

General information

90.60 Close of review   Sep 3, 2023

ISO

IULTCS International Union of Leather Technologists and Chemists Societies

International Standard

59.140.30   Leather and furs

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Scope

ISO 17234-2:2011 is supplementary to ISO 17234-1 and describes a special procedure to detect the use of certain azo colorants in commodities, which can release 4-aminoazobenzene. The procedure also detects 4-aminoazobenzene (Solvent Yellow 1) which is already available as free amine in commodities without reducing pretreatment.
Azo colorants that are able to form 4-aminoazobenzene generate, under the conditions of ISO 17234‑1, the amines aniline and 1,4-phenylenediamine. The presence of these 4-aminoazobenzene colorants cannot be reliably ascertained without additional information (e.g. the chemical structure of the colorant used) or without a special procedure.

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PUBLISHED
ISO 17234-2:2011
90.60 Close of review
Sep 3, 2023