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EC number: 216-653-1
CAS number: 1634-04-4
The 96-h IC20 is 103 mg/l and the 96-h IC50 is 491 mg/l in Pseudokirchneriella subcapitata.
limited information available from BenKinney et al. (1994), which
prevents a full evaluation of the study. The test was conducted
according to U.S. EPA guidelines, a WAF-method to prepare exposure
solutions was used according to guidelines, and measured treatment
concentrations were reported daily and found to be within 80% of nominal
doses. A 96- ErC50 value of 184 mg/l was found in Pseudokirchneriella
subcapitata (tested as Selenastrum capricornutum). According
to the limited information available, the test is valid.
The Hüls AG
study (1991c) is done according to directive 88/302/EEC; the test seems
valid although the results have been presented as nominal
concentrations. The measured test concentrations after 72 hours do not
deviate by more than 20 % from the freshly prepared test solutions. An
EbC50 and ErC50 of >800 in 72 hours (NOEC, 72 h, 470 mg/l) were found in
P. subcapitata (tested as S. capricornutum).
The test by
Slovnaft VÚRUP, a.s. (2005) is done according to the OECD guideline. As
no analytical methods were performed (estimation of test concentration
on basis of TOC) and the purity of the substance tested is not mentioned
in the report, the study was given a Klimisch rating of 2 and assigned
supporting. A 72-h EC50 value >900 mg/l was found and a NOEC of 489 mg/l
in Desmodesmus subspicatus.
test (1999g) is done according to ASTM guideline and seems a valid test.
The 96-h IC20 is 103 mg/l and the 96-h IC50 is 491 mg/l in Psuedokirchneriella
subcapitata (tested as S. capricornutum). As the IC20 value
of 103 mg/l for P. subcapitata is the most critical of all
studies performed in algae tests, this value will be used in the
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