Registration Dossier
Registration Dossier
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.
The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.
Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 235-595-8 | CAS number: 12336-95-7
Short-term toxicity to aquatic invertebrates
Administrative data
Link to relevant study record(s)
- Endpoint:
- short-term toxicity to aquatic invertebrates
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 48 hours
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- data from handbook or collection of data
- Justification for type of information:
- Reliable handbook with results cited by government agencies.
- Qualifier:
- equivalent or similar to guideline
- Guideline:
- OECD Guideline 202 (Daphnia sp. Acute Immobilisation Test)
- Principles of method if other than guideline:
- 48 hour acute toxicity
- GLP compliance:
- not specified
- Analytical monitoring:
- not specified
- Vehicle:
- no
- Test organisms (species):
- Daphnia magna
- Test type:
- not specified
- Water media type:
- freshwater
- Limit test:
- no
- Total exposure duration:
- 48 h
- 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
- Duration:
- 48 h
- Dose descriptor:
- EC50
- Effect conc.:
- ca. 67 mg/L
- Nominal / measured:
- estimated
- Conc. based on:
- other: Registered substance
- Basis for effect:
- mobility
- Validity criteria fulfilled:
- not specified
- Conclusions:
- Estimated EC50 67 mg/l for Chromium hydroxysulphate as Cr (HSO3)x (SO4)y
- 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In an unpublished study reported in this review article, the acute toxicity of chromium nitrate to Daphnia magna at 5 water hardnesses was measured and the 48-hr EC50 ranged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.
Reference
| Water hardness mg/l CaCO3 | 48 hr EC50 µg chromium/l |
| 52 | 16800 |
| 99 | 27400 |
| 110 | 26300 |
| 195 | 51400 |
| 215 | 58700 |
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In an unpublished study reported in this review article, the acute toxicity of chromium nitrate to Daphnia magna at 5 water hardnesses was measured and the 48-hr EC50 ranged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 67 mg/l for Chromium hydroxysulphate as Cr (HSO3)x (SO4)y
Key value for chemical safety assessment
Fresh water invertebrates
Fresh water invertebrates
- Effect concentration:
- 58 mg/L
Additional information
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
