Leather Prohibited Azo dye Substances determination

Determination of Banned Azo Dyes in Skin
Determination of Banned Azo Dyes in Skin

Azo dyes are synthetic dyes that contain an azo group in their structure. These colorants are widely used in the dyeing of textiles and leather products. However, some of the azo dyes are carcinogenic under certain conditions. 1907 / 2006 REACH Regulation, which is reserved in European Union countries, is considered as 22 carcinogenic aromatic amine which is prohibited for use in textile and leather products. There are also other dyestuffs that are dangerous to human health. These dyes are absorbed through the skin in the event of prolonged contact with the skin.

In order to prevent this dangerous situation, the directive 2004 / 21 / CE has been issued by the European Union and a test obligation has been imposed on the prohibited azo dyes in all textile products and leather products and leather and synthetic materials.

Tests and analyzes are performed by authorized laboratories to determine the amount of azo dyes prohibited on the skin within the scope of specific tests. The standards adopted in these studies are as follows:

  • TS EN ISO 17234-1 Leather - Chemical tests for the determination of some azo dyes in dyed leathers - Part 1: Determination for aromatic amines obtained from azo dyes

This standard specifies a method for determining the amount of certain azo dyes that release aromatic amine.

  • TS EN ISO 17234-2 Leather - Chemical tests for the determination of certain azo dyes in dyed leathers - Part 2: Determination of 4-aminoazobenzene

This standard complements the ISO 17234-1 standard described above. This standard also includes a method for determining the amount of 4-aminobenzene present as free amine in textile products.

  • DIN 53316 Skin test - Determination of some nitrogen in the skin
  • BVL B 82.02-3 (35 LMBG 82.02-3) Analysis of consumer goods - Determination of azo dyes of dyed leathers