DIN EN ISO 14362-3:2017-05

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 (for example, the chemical structure of the colorant used) or without a special procedure. This document 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 (for example, cotton, viscose, wool, silk), and - accessible by extracting the fibres (such as polyester or imitation leather). This document (EN ISO 14362-3:2017) has been prepared by Technical Committee CEN/TC 248 "Textile and textile products", the secretariat of which is held by BSI (United Kingdom), in collaboration with Technical Committee ISO/TC 38 "Textiles".