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EC number: 275-702-5
CAS number: 71617-10-2
Appropriate long-term studies on the environmental toxicity of the test
substance are not available. Following ECHA guidance R.10, the
environmental PNECs were derived from the lowest L(E)C50 value observed
in the available valid acute toxicity studies conducted with three
species from three trophic levels. The study with freshwater algae
resulted in the lowest ErC50 value of 0.2 mg/L and this concentration
was used as the starting point of PNEC derivation. No studies on the
toxicity to sediment-dwelling organisms or soil organisms are available.
The PNECs were calculated from the respective PNECs aqua with the
equilibrium partitioning method, which is applicable for substances with
log Kow values between 3 and 6.
Aquatic acute toxicity:
Due to the ErC50 of 0.2 mg/L as derived from the algae toxicity study,
Aquatic Acute Toxicity Category 1 applies (H400).
Aquatic chronic toxicity:
The only long-term study available is the algal growth inhibition study,
which resulted in a NOEC of 0.06 mg/L. This would lead to a
classification as Category Chronic 2 (H411) as the substance is readily
According to Table 4.1.0 in the 2nd Amendment of Regulation (EC) No
1272/2008, for substances for which adequate chronic toxicity data are
only available for one or two trophic levels, chronic classification has
to be assessed using the acute toxicity data for the other trophic
Based on the acute data Aquatic Chronic Toxicity Category 1 applies if
L(E)C50 < 1.0 mg/L and the substance furthermore is not rapidly
degradable and/or the experimentally determined BCF≥ 500 (or, if absent,
the log Kow≥ 4). As the log Kow was determined to be 4.78, and the EC50
for daphnia is 0.28 mg/L, Aquatic Chronic Toxicity Category 1 applies to
the test item (H410).
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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