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EC number: 283-829-2
CAS number: 84731-70-4
The PNEC for the aquatic environment are
derived from the lowest long-term results (EC10 or NOECs) observed in
the available three species (fish, Daphnia and algae) representing three
trophic levels by applying the appropriate assessment factors.
Four long-term toxicity tests were available
on this substance, which reported EC10 or NOECs based on the nominal
concentrations and on mean measured concentrations. As there were no
adverse effects seen in any study, it was decided that the nominal
values should be used. In all four acute studies the lowest NOEC value
was 0.06 mg/L, therefore this figure was used to calculate the PNECs.
PNEC STP was derived from the available study
on microbial respiration inhibition, giving a NOEC of 1000 mg/L, by
applying an assessment factor of 10. The PNEC secondary poisoning was
derived from the available information on repeated dose toxicity of 1000
g/kg bw/day by applying an assessment factor of 90.
For sediment PNECs, wet weight PNECs were
calculated using equilibrium partitioning as described in Guidance R.10
and R.16, conversion to dry weight was performed using a factor of 4.6.
PNEC for soil is derived from the available
study on short-term toxicity test(s) of earthworm, giving a LC50 > 1000
mg/kg dw soil by applying an assessment factor of 1000.
Environmental classification and labelling of a
substance is generally based on the data from short-term aquatic
toxicity results and adequate chronic toxicity data for all three
The lowest short-term L(E)C50 was greater than
nominal concentration of 100 mg/L from all three acute toxicity studies.
Adequate chronic toxicity data available for all
three trophic levels with NOEC/EC10 all equal to or greater than the
limit nominal concentration or highest nominal concentration.
Based on the above data, the test substance is not
classified as hazardous to the aquatic environment according to the CLP
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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