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EN ISO 17234-2:2011

Leather - Chemical tests for the determination of certain azo colorants in dyed leathers - Part 2: Determination of 4-aminoazobenzene (ISO 17234-2:2011) EN ISO 17234-2:2011

Publication date:   Apr 19, 2011

General information

60.60 Standard published   Mar 15, 2011

CEN

CEN/TC 289 Leather

European Norm

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.

Life cycle

NOW

PUBLISHED
EN ISO 17234-2:2011
60.60 Standard published
Mar 15, 2011