能够形成4-氨基偶氮苯的偶氮着色剂，在ISO 14362-1的条件下生成苯胺胺和1,4-苯二胺。如果没有额外的信息（例如所用着色剂的化学结构）或没有特殊程序，这些4-氨基偶氮苯着色剂的存在无法可靠地确定。 ISO 14362-3:2017是对ISO 14362-1的补充，描述了一种特殊程序，用于检测某些偶氮着色剂在商品中的使用情况，这些偶氮着色剂可能会释放4-氨基偶氮苯，并且 -无需萃取即可使用还原剂，尤其是纤维素和蛋白质纤维制成的纺织品（如棉、粘胶、羊毛、丝绸），以及 -可通过提取纤维（如聚酯或人造革）获得。 对于某些纤维共混物，可能需要应用9.3和9.4中的（有或没有萃取）。 该程序还检测4-氨基偶氮苯（溶剂黄1），它在商品中已作为游离胺存在，无需减少预处理。 使用某些偶氮着色剂，这些着色剂可能通过还原裂解偶氮基释放出欧洲议会和欧洲化学品注册、评估、授权和限制理事会（REACH）关于附件XVII的第1907/2006号法规（EC）中列出的一种或多种其他芳香胺，4-氨基偶氮苯除外，不能用这种方法定量测定。

Azo colorants that are able to form 4-aminoazobenzene, generate under the conditions of ISO 14362-1, 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. ISO 14362-3:2017 is supplementary to ISO 14362-1 and describes a special procedure to detect the use, in commodities, of certain azo colorants, which may release 4-aminoazobenzene, and that are - accessible to reducing agent without extraction, particularly concerning textiles made of cellulose and protein fibres (e.g. cotton, viscose, wool, silk), and - accessible by extracting the fibres (e.g. polyester or imitation leather). For certain fibre blends, in 9.3 and 9.4 (with and without extraction) may need to be applied. The procedure also detects 4-aminoazobenzene (Solvent Yellow 1), which is already available as free amine in commodities without reducing pre-treatment. The use of certain azo colorants, which may release, by reductive cleavage of their azo group(s), one or more of the other aromatic amines listed in the Regulation (EC) No 1907/2006 of the European Parliament and of the Council on the Registration, Evaluation, Authorization and Restriction of Chemicals (REACH) as regards Annex XVII, except 4-aminoazobenzene, cannot be determined quantitatively with this method.