1,5,9 cyclododecatriene

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Definition of 1,5,9-Cyclododecatriene (CDDT):
1,5,9-Cyclododecatriene is a liquid with a yellow tint and pungent odour[1].
This is the common definition for 1,5,9-Cyclododecatriene (CDDT), other definitions can be discussed in the article


1,5,9 cyclododecatriene

CDDT is used to produce cyclododecane, which is used in the production of dodecanedioic acid.

It has a high volatility, which causes it to have an aquatic half-life (by evaporation) of only 1,3 hours. In the atmosphere it will be degraded rapidly (in less than 30 minutes). As a consequence CDDT will be found mostly in soils, and very little in water, air or sediment. It however is considered not to be biodegradable and has a low tendency to bioaccumulate.

Aquatic concentrations above 0,2 mg/l cause acute toxicity to fish, algae and invertebrates. A dose of 2,5 g/kg body weight is lethal to rats.

Considering CDDT it is only used as an intermediate in the production of other chemicals, its high volatility and degradability, it has only a minor potential aquatic exposure and thus poses only a minor risk to aquatic organisms.[1]

Environmental standards and legislation

Included in the OSPAR list of substances of priority action


  1. 1,0 1,1 EPA High Production Volume Challenge Program (HPV) 2003: Robust Summaries & Test Plans: C1,5,9-Cyclododecatriene