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EC number: 947-329-4
CAS number: -
Table 1: Immobilization of Daphnia magna after 24 and 48 h. The
concentrations are provided as anionic active ingredient.
Measured concentration geometric mean [mg/L]
48h EC50 (Daphnia magna, immobilization) > 100 mg/L
Since no reliable acute toxicity to aquatic invertebrates test is
available for Sulfuric acids, C9-11-iso-C10 rich, alkyl esters,
sodium salt, in accordance to Regulation (EC) No. 1907/2006 Annex
XI, 1.5 a read-across to other structurally related substances was
conducted. As the toxicity of alkyl sulfates is dependent on the carbon
chain length, it is expected that the toxic effects are comparable for
the similar homologues.
One GLP study investigating short-term toxic effects of C8-isoAS Na (CAS
126-91-2) to Daphnia magna is available (Elementis, 1995). The test was
performed according to EU Method C.2 under static conditions. Inhibition
of mobility of daphnids caused by the test substance was determined
after 24 and 48 of static exposure to five test concentrations up to 697
mg a.i./L (measured concentration equal to 900 mg a.i./L of nominal
concentration). The results show that the 48-hour EC50 value was 483 mg
a.i./L (measured concentration).
Moreover two 24-hour tests with Daphnia magna are available for C10AS Na
(CAS 142-87-0). The first non-GLP study followed a method described by
Norme Francaise Homologue, 1983, NF T90-31 (Sanchez Leal 1991). The
24-hour EC50 value was 470 mg/L. Analytical check of the test
concentrations was not provided. The other non-GLP study was performed
following an AFNOR T.90301 (1974) method (Lundahl and Cabridenc 1978).
The obtained results showed that the 24-hour EC50 value was 800 mg/L
(nominal concentrations). Analytical measurements are not available.
Due to structural and property similarities with the tested similar
substances, it can be concluded that the above results apply also to Sulfuric
acids, C9-11-iso-C10 rich, alkyl esters, sodium salt. The 48-hour
EC50 value for aquatic invertebrates is above 100 mg/L.
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