EN 14362-3:2012

Foreword
1 Scope
2 Normative references
3 General
4 Principle
5 Safety precautions
6 Reagents
7 Apparatus
8 Procedure
9 Evaluation
10 Test report
Annex A (informative) - Chromatographic analyses
Annex B (normative) - Calculation
Annex C (informative) - Reliability of the method
Annex D (informative) - Assessment guide - Interpretation
        of analytical results

Azo colorants that are able to form 4-aminoazobenzene, generate under the conditions of EN 14362-1 theamines aniline and 1,4-phenylenediamine. The presence of these 4-aminoazobenzene colorants cannot bereliably ascertained without additional information (e.g. the chemical structure of the colorant used) or withouta special procedure.This part of EN 14362 is supplementary to Part 1 and describes a special procedure to detect the use ofcertain azo colorants in commodities, which may release 4-aminoazobenzene,- accessible to reducing agent without extraction, particularly concerning textiles made of cellulose andprotein fibres (e.g. cotton, viscose, wool, silk);- accessible by extracting the fibres (e.g. polyester or imitation leather).For certain fibre blends both parts of this standard (without or with extraction) may need to be applied.The procedure detects as well 4-aminoazobenzene (Solvent Yellow 1) which is already available as freeamine 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 moreof the other aromatic amines listed in the Regulation (EC) No 1907/2006 of the European Parliament and ofthe Council on the Registration, Evaluation, Authorisation and Restriction of Chemicals (REACH) as regardsAnnex XVII, except 4-aminoazobenzene, cannot be determined quantitatively with this method.