Registration Dossier
Registration Dossier
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EC number: 215-158-8 | CAS number: 1308-14-1
Toxicity to soil macroorganisms except arthropods
Administrative data
- Endpoint:
- toxicity to soil macroorganisms except arthropods: long-term
- Type of information:
- migrated information: read-across from supporting substance (structural analogue or surrogate)
- Adequacy of study:
- key study
- Study period:
- 1981
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: see 'Remark'
- Remarks:
- Information from a peer reviewed Assessment Report. Chromium(III) hydroxide is insoluble between pH 6.8 and 11 (see section 4.8). Under conditions < pH 6.8 hydrolysis takes place and at > pH11.5 hydroxocomplexes are formed. The main toxic principle of these solutions < pH6.8 and > pH11.5 is dissolved Cr(III). Therefore Chromium(III) nitrate is used as supporting substance.
Data source
Reference
- Reference Type:
- other: Peer reviewed assessment report
- Title:
- Unnamed
- Year:
- 2 009
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Principles of method if other than guideline:
- data from peer-reviewed assessment report
- GLP compliance:
- not specified
Test material
- Reference substance name:
- Chromium (III) oxide
- EC Number:
- 215-160-9
- EC Name:
- Chromium (III) oxide
- Cas Number:
- 1308-38-9
- Reference substance name:
- Chromium trinitrate
- EC Number:
- 236-921-1
- EC Name:
- Chromium trinitrate
- Cas Number:
- 13548-38-4
- Reference substance name:
- Chromium(III) oxide
- IUPAC Name:
- Chromium(III) oxide
Constituent 1
Constituent 2
Constituent 3
Test organisms
- Test organisms (species):
- Caenorhabditis elegans
- Animal group:
- nematods
- Details on test organisms:
- free-living soil nematode
Study design
- Study type:
- laboratory study
- Substrate type:
- other: activated sludge
- Total exposure duration:
- 8 wk
Results and discussion
Effect concentrations
- Duration:
- 24 h
- Dose descriptor:
- LC50
- Effect conc.:
- 946 other: mg chromium(III)/L
- Nominal / measured:
- not specified
- Conc. based on:
- other: mg chromium)III)/kg
- Basis for effect:
- mortality
- Remarks on result:
- other: concentration besed on free ion
Applicant's summary and conclusion
- Validity criteria fulfilled:
- not applicable
- Conclusions:
- The 24h acute toxicity of chromium(III)nitrate to the free-living soil nematode Caenorhabditis elegans is 24h LC = 946 mg chromium/L for the free ion .
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