Registration Dossier
Registration Dossier
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EC number: 696-231-5 | CAS number: 1361000-03-4
Ecotoxicological Summary
Administrative data
Hazard for aquatic organisms
Freshwater
- Hazard assessment conclusion:
- PNEC aqua (freshwater)
- PNEC value:
- 2.4 µg/L
- Assessment factor:
- 50
- Extrapolation method:
- assessment factor
- PNEC freshwater (intermittent releases):
- 10.6 µg/L
Marine water
- Hazard assessment conclusion:
- PNEC aqua (marine water)
- PNEC value:
- 0.24 µg/L
- Assessment factor:
- 500
- Extrapolation method:
- assessment factor
STP
- Hazard assessment conclusion:
- PNEC STP
- PNEC value:
- 0.895 mg/L
- Assessment factor:
- 100
- Extrapolation method:
- assessment factor
Sediment (freshwater)
- Hazard assessment conclusion:
- PNEC sediment (freshwater)
- PNEC value:
- 0.021 mg/kg sediment dw
- Extrapolation method:
- equilibrium partitioning method
Sediment (marine water)
- Hazard assessment conclusion:
- PNEC sediment (marine water)
- PNEC value:
- 0.002 mg/kg sediment dw
Hazard for air
Air
- Hazard assessment conclusion:
- no hazard identified
Hazard for terrestrial organisms
Soil
- Hazard assessment conclusion:
- PNEC soil
- PNEC value:
- 0.003 mg/kg soil dw
- Extrapolation method:
- equilibrium partitioning method
Hazard for predators
Secondary poisoning
- Hazard assessment conclusion:
- no potential for bioaccumulation
Additional information
Conclusion on classification
The substance 1-hexyl-1H-pyrazol-4,5-diamine hemisulfate is not readily biodegradable and it is not considered as potentially bioaccumulable due to a log Kow less than 4. The acute aquatic toxicity LC50/EC50 on fish, daphnia and algae are > 1 mg/L and < 10 mg/l. The chronic toxicity is represented by a NOEC of 0.12 mg/L related to the daphnia reproduction test and an EC10 on the algae growth rate of 0.42 mg/L. Taking into account the chronic toxicity on daphnia and algae which is between 0.1 and 1 mg/L, the acute toxity on fish between 1 and 10 mg/L, and the lack of biodegradation, the substance "1 -hexyl-1H-pyrazol-4,5 -diamine hemisulfate" is classified as dangerous to the environment "Aquatic chronic cat. 2" with the hasard statement H411: Toxic to aquatic life with long lasting effects, according to the Regulation N° 1272/2008.
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.
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