18 May 2017
New European Standard for Aromatic Amines Derived from Azo Colorants Released
The new European standard methods for determining restricted aromatic amines derived from azo colorants in textiles has been updated and published by the European Committee for Standardization (CEN) on February 2017. The EN 14362-1/3:2017 superseded existing standards published in 2012 and describe improvements in the analytical procedure and guidance on interpreting results.
The two updated standards used for the restriction on azo colorants are:
- EN ISO 14362-1:2017 : Textiles – Methods for determination of certain aromatic amines derived from azo colorants - Part 1: Detection of the use of certain azo colorants accessible with and without extracting the fibres (ISO 14362-1:2017) 
- EN ISO 14362-3:2017 : Textiles – Methods for determination of certain aromatic amines derived from azo colorants - Part 3: Detection of the use of certain azo colorants, which may release 4-aminoazobenzene (ISO 14362-3:2017 )
The two updated standards are related to entry 43 of Annex XVII of the REACH Regulation (EC) No. 1907/2006 which prohibits the use of azo colorants in textile and leather articles which may come into direct and prolonged contact with the human skin or oral cavity. The legislated 22 aromatic amines obtained by reductive cleavage of one or more azo colorants may not be used in items in concentrations greater than 30 mg/kg as determined by gas chromatography. The methods will become harmonized in the EU market for REACH Annex XVII once officially endorsed in the Official Journal of the European Union (OJEU).
EN ISO 14362-1:2017 describes a method to detect the presence of certain amines that may not be used in the manufacture or treatment of certain commodities made of textile fibres and that are accessible from azo colorants by reducing agent with and without extraction. The method is relevant for all colored textiles, e.g. dyed, printed and coated textiles.
Azo colorants accessible to reducing agent without extraction are those used to color with pigments or to dye cellulose fibres (e.g. cotton, viscose), protein fibres (e.g. wool, silk) and synthetic fibres (e.g. polyamide, acrylic). Azo colorants accessible with extraction are those used to dye man-made fibres with disperse dyes (e.g. polyester, polyamide, acetate, triacetate, acrylic and chlorofibre).
Highlight of major updates in EN ISO 14362-1:2017 include:
- Xylene is used for extracting the disperse dye from fiber
- Both direct reduction and colorant extraction may be required separately for synthetic fiber
- False-positive case evaluation is listed in Appendix C
|Colorants testing (Chemical formulation)|
For any particular concerns regarding the new European standard for determining the restricted aromatic amines derived from azo colorants in textiles for REACH Annex XVII compliance, please do not hesitate to contact us for further information.
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