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An extremely potent environmental hazard. Dioxin, or TCDD, is an unfortunate pollutant produced in the production and incineration of PVC plastics, chlorinated solvents, chlorinated pesticides, and chlorine bleached paper. It was also a contaminant in the defoliant, Agent Orange, that was used in Vietnam in the 1960's. Dioxin compounds are fat-soluble and have been found in almost all areas of the globe from humans to the depths of the oceans. For a short period, the name Dioxin was also used as a brand label for Dimethoxane.

Synonyms and Related Terms

TCDD; TCDBD; 2,3,7,8-tetrachlorodibenxo-p-dioxin; Agent Orange


  • Toxic by ingestion, inhalation and skin absorption.
  • Carcinogenic.
  • Teratogenic.
  • Hazardous to environment: animals, birds, and fish.
  • ThermoFisher: SDS

Physical and Chemical Properties

Composition C12H4Cl4O2
CAS 1746-01-6
Melting Point 295-325 C
Molecular Weight mol. wt. = 321.96

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