Registration Dossier
Registration Dossier
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EC number: 212-084-8 | CAS number: 760-93-0
Ecotoxicological Summary
Administrative data
Hazard for aquatic organisms
Freshwater
- Hazard assessment conclusion:
- PNEC aqua (freshwater)
- PNEC value:
- 0.73 mg/L
- Assessment factor:
- 10
- Extrapolation method:
- assessment factor
- PNEC freshwater (intermittent releases):
- 0.73 mg/L
Marine water
- Hazard assessment conclusion:
- PNEC aqua (marine water)
- PNEC value:
- 0.73 mg/L
- Assessment factor:
- 10
- Extrapolation method:
- assessment factor
STP
- Hazard assessment conclusion:
- PNEC STP
- PNEC value:
- 89.5 mg/L
- Assessment factor:
- 1
- Extrapolation method:
- assessment factor
Sediment (freshwater)
- Hazard assessment conclusion:
- PNEC sediment (freshwater)
- PNEC value:
- 3.6 mg/kg sediment dw
- Extrapolation method:
- equilibrium partitioning method
Sediment (marine water)
- Hazard assessment conclusion:
- PNEC sediment (marine water)
- PNEC value:
- 3.6 mg/kg sediment dw
- Extrapolation method:
- equilibrium partitioning method
Hazard for air
Air
- Hazard assessment conclusion:
- no hazard identified
Hazard for terrestrial organisms
Soil
- Hazard assessment conclusion:
- PNEC soil
- PNEC value:
- 0.26 mg/kg soil dw
- Extrapolation method:
- equilibrium partitioning method
Hazard for predators
Secondary poisoning
- Hazard assessment conclusion:
- no potential for bioaccumulation
Additional information
Methacrylic anhydride, like other anhydrides of organic acids, hydrolyses in an aqueous environment with a half-life in the order of minutes resulting in two molecules of methacrylic acid per molecule methacrylic anhydride. As a consequence, instead of performing new studies, methacrylic acid studies have been used in many places of the assessment to describe the effects of methacrylic anhydride. For the purpose of PNEC derivation the no-effect-levels of methacrylic acid have been divided by 1.117 (corrected for molecular weight difference between two molecules methacrylic acid vs. one molecule methacrylic anhydride).
For methacrylic acid there are chronic data available for the three standard trophic leves plus additional data in marine species. The NOEC of 8.2 mg/L in algae has been carried forward for the risk assessment. The ecotoxicity data of methacrylic acid in marine species do not indicate higher sensitivity of marine life.
Conclusion on classification
No environmental classification is required.
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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