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Short-term toxicity to aquatic invertebrates

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Reference
Endpoint:
short-term toxicity to aquatic invertebrates
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
data from handbook or collection of data
Principles of method if other than guideline:
48 hour acute toxicity
GLP compliance:
not specified
Test organisms (species):
Daphnia magna
Test type:
not specified
Water media type:
freshwater
Hardness:
52 mg/l CaCO3
Details on test conditions:
Static
Duration:
48 h
Dose descriptor:
EC50
Effect conc.:
ca. 16.8 mg/L
Conc. based on:
element

 Water hardness mg/l CaCO3 48 hr EC50 µg chromium/l
 52 16800 
99   27400
110   26300
 195  51400
215   58700
Executive summary:

In an unpublished study reported in this review article, the acute toxicity of chromium nitrate to Daphnia magna at 5 water hardnesses was measured and the 48-hr EC50 ranged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 16,800 µg chromium/L in soft water to 57,800 µg chromium/L in hard water.

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In an unpublished study reported in this review article, the acute toxicity of chromium nitrate to Daphnia magna at 5 water hardnesses was measured and the 48-hr EC50 ranged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 33.4 mg/l for Chromium hydroxide

Key value for chemical safety assessment

Fresh water invertebrates

Fresh water invertebrates
Effect concentration:
33.4 mg/L

Additional information

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