Registration Dossier
Registration Dossier
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EC number: 231-818-8 | CAS number: 7757-79-1
Long-term toxicity to aquatic invertebrates
Administrative data
- Endpoint:
- long-term toxicity to aquatic invertebrates
- Adequacy of study:
- supporting study
- Reliability:
- 4 (not assignable)
- Rationale for reliability incl. deficiencies:
- secondary literature
Data source
Reference
- Reference Type:
- publication
- Title:
- Potassium Nitrate: International Uniform Chemical Information Database
- Author:
- European Commission
- Year:
- 2 000
- Bibliographic source:
- CD-ROM Edition
Materials and methods
Test guideline
- Qualifier:
- no guideline followed
- Principles of method if other than guideline:
- not specified
- GLP compliance:
- no
Test material
- Reference substance name:
- Potassium nitrate
- EC Number:
- 231-818-8
- EC Name:
- Potassium nitrate
- Cas Number:
- 7757-79-1
- Molecular formula:
- HNO3.K
- IUPAC Name:
- potassium nitrate
- Test material form:
- solid: crystalline
- Details on test material:
- Name of test material: potassium nitrate (KNO3)
Physical appearance: colourless crystalline solid or a white crystalline or granular powder
Constituent 1
Sampling and analysis
- Analytical monitoring:
- no
Test solutions
- Vehicle:
- not specified
Test organisms
- Test organisms (species):
- other: hydra attenuata
Study design
- Test type:
- not specified
- Water media type:
- not specified
- Total exposure duration:
- 12 d
Results and discussion
Effect concentrations
- Duration:
- 12 d
- Dose descriptor:
- NOEC
- Effect conc.:
- > 245 - < 408 mg/L
- Conc. based on:
- test mat.
- Basis for effect:
- reproduction
Any other information on results incl. tables
At 81.5 mg KNO3/L (50 mg NO3/L) and 245 (150 mg NO3/L) mg KNO3/L the growth rate was similar or slightly superior to that of the controls. At 408 mg KNO3/L the rate of growth was considerably retarded, but clubbing of tentacles was not observed. Potassium nitrate was found to be the least toxic of the three nitrates (KNO3, NaNO3, (NH4)2NO3) tested with a NOEL between 245 and 408 mg KNO3/L. The cation exerted a considerable influence on the toxicity of the nitrate solutions tested.
Applicant's summary and conclusion
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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.
