Reductive Cleavage Method for Azo Dyes EN ISO 14362
topic
EN ISO 14362 extracts dyes from fabric with citrate buffer at pH 6, reduces azo bonds with sodium dithionite at 70 degrees Celsius for 30 minutes, extracts released aromatic amines into diethyl ether and tert-butyl methyl ether, then identifies and quantifies amines by GC-MS comparison against certified reference standards at the 30 milligrams per kilogram regulatory threshold.
Role
The internationally standardised reference method for detecting 22 carcinogenic aromatic amines derived from banned azo dyes in textiles, forming the technical basis for REACH Annex XVII compliance testing across EU market surveillance, supply chain audit, and third-party certification programmes.