Re: Azo dyes and PCP issue - RoHS
Hello Keung830,
Harmonised European Standards for measuring azo colorants and pentachlorophenol (PCP) in leather or textiles exist or are under development in collaboration with ISO.
CEN Technical Committee TC289 (leather) has published a technical specification from ISO as ISO/TS 17234:2003, Leather - Chemical tests - Determination of certain azo colourants in dyed leathers and EN ISO 17070:2006, Leather - Chemical tests - Determination of pentachlorophenol content.
CEN TC201 (Leather and imitation leather goods and footwear) appear to have delegated the azo colorant testing standards to TC289.
CEN TC248 (Textiles and textile products) have published EN 14362 (2 parts), Textiles - Methods for determination of certain aromatic amines derived from azo colorants. Parts 1 and 2 are without and with extraction respectively.