Restrictions on Chrome VI Restriction is one of the available instruments in EU-REACh to protect human health and the environment from unacceptable risks posed by chemicals. An explanation of Biological Oxygen Demand (BOD) and Chemical Oxygen Demand (COD) Dirick von Behr, Strategic Leather Manager, explains Biological Oxygen Demand (BOD) and Chemical Oxygen Demand (COD) and which is best for the environment. Page 2 of 2Previous12 Knowledge center Go to all knowledge items Knowledge Stay informed Receive the latest company news and industry updates Subscribe