International Standard
ISO 17234-2:2011
Leather — Chemical tests for the determination of certain azo colorants in dyed leathers — Part 2: Determination of 4-aminoazobenzene
Reference number
ISO 17234-2:2011
Edition 1
International Standard
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ISO 17234-2:2011
Published (Edition 1, 2011)
This standard was last reviewed and confirmed in 2018. Therefore this version remains current.

ISO 17234-2:2011

ISO 17234-2:2011
CHF 96
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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.

General information

  •  : Published
     : 2011-03
    : Close of review [90.60]
  •  : 1
     : 16
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