Chromium (VI) is a strong oxidant and is known as a carcinogenic substance that should be controlled, particularly in textile products and leather garments.

It is an undesirable element to remain on the skin if chrome tanning is applied during tanning of the skin. Chromium (VI) level may also increase in the skin during storage and transportation after the leather is processed.

Chromium in powder form has been used in tanning processes in leather sector for many years. The tanning process is carried out with the aim of providing durability to the leather for a long time. However, according to recent research results, chromium (VI) ions and compounds cause cancer. The use of chromium, which is so harmful to human health, in tanning processes has been limited with legal regulations and published standards. Chromium weakens the immune system in people's body and causes various liver disorders. Chromium also causes genetic mutations in the human body.

Tests are performed by authorized laboratories to determine the amount of chromium (VI) in the skin under specific tests. These tests take into account the standards published by national and international organizations. The standards for determining the amount of chromium (VI) in the skin are as follows:

• TS EN ISO 17075 Leather - Chemical tests - Determination of chromium 6
• ISO 17075 Skin tests - Chemical tests - Determination of chromium (VI) content
• DIN 53314 Skin test - Determination of the content of chromium (VI) in the skin
• DIN CEN / TS 14495 Leather - Chemical tests - Determination of chromium (VI) content
• TS EN ISO 5398-1 Skin - Chemical determination of chromic oxide content - Part 1: Quantitative determination by titration

• TS EN ISO 2418 Leather - Chemical, physical, mechanical and fastness tests - Sampling zones