Registration Dossier
Registration Dossier
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EC number: 256-852-0 | CAS number: 50925-66-1
Short-term toxicity to aquatic invertebrates
Administrative data
Link to relevant study record(s)
Description of key information
In an unpublished study reported in this review article, the acute toxicity of chromium nitrate to Daphnia magna at 5 water hardnesses was measured and the 48-hr EC50 ranged from 16.8 mg chromium/L in soft water to 57.8 mg chromium/L in hard water.
Estimated EC50 ca 42 mg/l for chromium hydroxychloride
Key value for chemical safety assessment
Fresh water invertebrates
Fresh water invertebrates
- Effect concentration:
- 42 mg/L
Additional information
Data on chloride suggests tolerance by freshwater species to be in excess of 100 mg/l Cl.
Many 'freshwater' sources have chloride > 100 mg/l.
Standard OECD hard test-water contains > 100 mg/l
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