Registration Dossier
Registration Dossier
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EC number: 236-921-1 | CAS number: 13548-38-4
Toxicity to aquatic algae and cyanobacteria
Administrative data
Link to relevant study record(s)
Description of key information
The 96h-ErC50 of the test substance to the green algae (Selenastrum capricornutum) was 1.82 mg/L.
Key value for chemical safety assessment
- EC50 for freshwater algae:
- 1.82 mg/L
Additional information
As no data of chromium trinitrate is available for this endpoint, data on chromium trichloride can be used for read-across in a weight of evidence approach, as aquatic toxicity is mainly determined by the chromium(III) cation. Two short-term tests were conducted to fresh alga (Selenastrum capricornutum). Both studies were conducted to evaluate the short-term toxicity of the test substance to the algae during 4 days exposure. The 96h-ErC50 of the test substance (chromium trichloride) to the green algae (Selenastrum capricornutum) were 0.4 mg Cr/L and 0.397 mg Cr/L respectively. Thus, the 96h-ErC50 of chromium trinitrate to the algae can be estimated as 1.82 mg/L based on equimolar toxicity and this value is taken forward for hazard and risk assessment.
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