DDC-CO[1]) is a polychlorinated flame retardant produced by Oxychem.

The syn and anti isomer are formed in the approximate ratio of 1:3.

[9] In 2011, modeling data indicated that Dechlorane Plus may be persistent, bioaccumulative, and subject to long-range transport.

[10] The 2023 Conference of the Parties of the United Nations Stockholm Convention on Persistent Organic Pollutants took the decision to eliminate the use of Dechlorane Plus, by listing this chemical in Annex A to the Convention.

[11] Dechlorane plus was added to the list of REACH Substances of Very High Concern on January 15, 2018.