<p>Azo colorants that are able to form 4-aminoazobenzene, generate under the conditions of ISO 24362‑1:2014 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.</p>
<p>ISO 24362‑3:2014 is supplementary to ISO 24362‑1:2014 and describes a special procedure to detect the use of certain azo colorants in commodities, which may release 4-aminoazobenzene, accessible to reducing agent without extraction, particularly concerning textiles made of cellulose and protein fibres (e.g. cotton, viscose, wool, silk); accessible by extracting the fibres (e.g. polyester or imitation leather).</p>
<p>For certain fibre blends both parts of ISO 24362 (without or with extraction) may need to be applied.</p>
<p>The procedure detects as well 4-aminoazobenzene (Solvent Yellow 1) which is already available as free amine in commodities without reducing pre-treatment.</p>
Registration number (WIID)
62441
Scope
<p>Azo colorants that are able to form 4-aminoazobenzene, generate under the conditions of ISO 24362‑1:2014 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.</p>
<p>ISO 24362‑3:2014 is supplementary to ISO 24362‑1:2014 and describes a special procedure to detect the use of certain azo colorants in commodities, which may release 4-aminoazobenzene, accessible to reducing agent without extraction, particularly concerning textiles made of cellulose and protein fibres (e.g. cotton, viscose, wool, silk); accessible by extracting the fibres (e.g. polyester or imitation leather).</p>
<p>For certain fibre blends both parts of ISO 24362 (without or with extraction) may need to be applied.</p>
<p>The procedure detects as well 4-aminoazobenzene (Solvent Yellow 1) which is already available as free amine in commodities without reducing pre-treatment.</p>
