Registration Dossier
Registration Dossier
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EC number: 476-160-4 | CAS number: 54807-34-0
Ecotoxicological Summary
Administrative data
Hazard for aquatic organisms
Freshwater
- Hazard assessment conclusion:
- PNEC aqua (freshwater)
- PNEC value:
- 1.4 mg/L
- Assessment factor:
- 10
- Extrapolation method:
- assessment factor
- PNEC freshwater (intermittent releases):
- 0.1 mg/L
Marine water
- Hazard assessment conclusion:
- no data: aquatic toxicity unlikely
STP
- Hazard assessment conclusion:
- PNEC STP
- PNEC value:
- 32 mg/L
- Assessment factor:
- 10
- Extrapolation method:
- assessment factor
Sediment (freshwater)
- Hazard assessment conclusion:
- PNEC sediment (freshwater)
- PNEC value:
- 8.33 mg/kg sediment dw
- Assessment factor:
- 1 000
- Extrapolation method:
- equilibrium partitioning method
Sediment (marine water)
- Hazard assessment conclusion:
- insufficient hazard data available (further information necessary)
Hazard for air
Air
- Hazard assessment conclusion:
- no hazard identified
Hazard for terrestrial organisms
Soil
- Hazard assessment conclusion:
- PNEC soil
- PNEC value:
- 9.9 mg/kg soil dw
- Assessment factor:
- 100
- Extrapolation method:
- assessment factor
Hazard for predators
Secondary poisoning
- Hazard assessment conclusion:
- no potential for bioaccumulation
Additional information
A very small amount of environmental data is has been carried out on the registration substance 5,5 -dimehtylhydantoin, sodium salt (NaDMH), whilst the majority of the environmental data available was carried out on the analogue substance 5,5 -dimethylhydantoin (DMH). Due to the behaviour of NaDMH in the aqueous environment (NaDMH rapidly dissociates in water), DMH should be considered to be the substance of interest for environmental risk assessment.
Conclusion on classification
NaDMH is not classified for the environment.
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