Chromium (VI), also known as Hexavalent Chromium, can be an undesirable by-product of chrome leather tanning. During the tanning process, inadequate chemical treatment can cause oxidation of Chromium (III) compounds to form Chromium (VI). This oxidation can happen during finishing or due to environmental conditions.
Chromium (VI) is allergenic and can lead to contact dermatitis if it comes into contact with sensitised skin. Certain Chromium (VI) compounds are classified as carcinogenic, primarily if inhaled. Aside from the impact of these compounds on people and the environment, businesses are also directly affected by regulations prohibiting its presence in tanned leather.
This is why chromium VI testing (also known as hexavalent chromium testing) is necessary to ensure that leather products are safe before they reach the public.