Registration Dossier
Registration Dossier
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Reaction mass of tetrasodium 7,7'-(carbonyldiimino)bis[4-hydroxy-3-[(2-methyl-4-sulphonatophenyl)azo]naphthalene-2-sulphonate] and tetrasodium 4-[[1-hydroxy-6-[[[[5-hydroxy-6-[(2-methyl-4-sulphonatophenyl)azo]-7-sulphonato-2-naphthyl]amino]carbonyl]amino]-3-sulphonato-2-naphthyl]azo]benzoate and tetrasodium 4,4'-[carbonylbis[imino(1-hydroxy-3-sulphonatonaphthalene-6,2-diyl)azo]]dibenzoate
EC number: 942-930-8 | CAS number: -
Short-term toxicity to fish
Administrative data
Link to relevant study record(s)
Description of key information
The 96-h LC50 value is >90 mg/L (nominal) in fish after correction for the percentage active ingredient in the tested substance.
Key value for chemical safety assessment
Additional information
Two studies on the acute toxicity of the substance to fish are reported.
In the first study the acute toxicity to fish was determined in a study according to DIN 38 412 part 15 (no data on GLP status) (BASF, 1981). In this limit test a single group of 10 fish (L. idus) was exposed to 0 (control) or 500 mg/L test substance for 96 hours under static conditions. No test substance analysis was performed. Mortality and symptoms of toxicity were recorded after 1, 4, 24, 48, 72 and 96 hours exposure. No deaths occurred in the 500 mg/L test group or the controls throughout the test and no symptoms of toxicity were noted. Based on these findings the 96 -h LC50 values is reported as >500 mg/L. As the purity of active ingredient in the tested substance is ca. 18%, the 96 -h LC50 value for the active ingredient is >90 mg/L (based nominal concentration). The fact that no test substance analysis was performed is considered to be an acceptable shortcoming as in more recent studies test substance recovery was well within ±20% of nominal and there are no other indications that loss of test material is to be expected.
In the second report, the results of a fish acute toxicity study according to OECD 203 are presented. In this study zebrafish (B. rerio) were exposed to the substance for 96 hours under static conditions. A 96 -h LC50 value of >1000 mg/L is reported. As the purity of active ingredient in the tested substance is reported to be 20%, the 96 -h LC50 value for the active ingredient is >200 mg/L (based nominal concentration). Although in the study report no details on study design and test conditions are provided, the reported effect value is considered as supportive for classification and labeling.
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