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EC number: 216-721-0
CAS number: 1653-19-6
Data has been obtained from studies conducted with
2,3-dichlorobutadiene-1,3. Acute toxicity data are available for fish,
Daphnia and algae. The lowest acute toxicity endpoint use for use in
determining the freshwater aquatic PNEC is the Daphnia acute 48 hour
EC50 value of 1.28 mg/L.
The following PNECs were calculated using this endpoint:
PNEC Aqua (freshwater) - Based on an assessment factor of 1000, the PNEC
is 0.00128 mg/L.
PNEC Aqua (marine water) - Based on an assessment factor of 10000 the
PNEC is 0.000128 mg/L.
PNEC Aqua (intermittent releases) - Based on an assessment factor of 100
the PNEC is 0.0128 mg/L.
The 3 hour EC10 obtained from an activated sludge respiration
study was 163.8 mg/L. Based on an assessment factor of 10 the PNEC STP
is 16.38 mg/L.
According to Annex VI to Regulation (EC) No 1272/2008,
2,3-dichlorobutadiene-1,3 is classified for environmental hazards as:
Aquatic Chronic 2 (H411) – toxic to aquatic life with long lasting
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
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