Registration Dossier
Registration Dossier
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EC number: 275-031-8 | CAS number: 70942-01-7
Short-term toxicity to fish
Administrative data
Link to relevant study record(s)
Description of key information
LC50 (96 h) Zebra fish > 100 mg/l
Key value for chemical safety assessment
Fresh water fish
Fresh water fish
- Effect concentration:
- 100 mg/L
Additional information
The short-term toxicity to fish was evaluated by considering data on the substance and on the similar substance 2 -A. Justification for Read Across is given in Section 13 of IUCLID.
Acute toxicity for Zebra fish was evaluated in the 96 hours screening test, according to the OECD guideline 203. A single dose was administrated at 100 mg/l (limit test) with no effect (Pfeifle V., 1999).
The study result is confirmed by other three studies performed between 1973 and 1978 on Salmo Trout at 24 and 48, for which only a summary is available. In all cases the LC50 was reported as greater than 100 mg/l (in one case also greater than 1000 mg/l).
Two fish acute toxicity tests are available (Ciba-Geigy, 1994 and Novartis Services AG., 1998) on the similar substance 2 -A pre-treated with light in order to obtain a high percentage of photodegraded products and verify their impact on aquatic toxicity. Both tests resulted in a LC50 > 100 mg/l, demonstrating that those degradation products are no more dangerous for the environment than the parent compounds.
In conclusion, no fish acute toxicity is expected for the substance or its photodegradation products.
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