Registration Dossier
Registration Dossier
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EC number: 242-361-9 | CAS number: 18479-57-7
Ecotoxicological Summary
Administrative data
Hazard for aquatic organisms
Freshwater
- Hazard assessment conclusion:
- PNEC aqua (freshwater)
- PNEC value:
- 0.005 mg/L
- Assessment factor:
- 1 000
- Extrapolation method:
- assessment factor
Marine water
- Hazard assessment conclusion:
- PNEC aqua (marine water)
- PNEC value:
- 0 mg/L
- Assessment factor:
- 10 000
- Extrapolation method:
- assessment factor
STP
- Hazard assessment conclusion:
- PNEC STP
- PNEC value:
- 10 mg/L
- Assessment factor:
- 100
- Extrapolation method:
- assessment factor
Sediment (freshwater)
- Hazard assessment conclusion:
- PNEC sediment (freshwater)
- PNEC value:
- 1.78 mg/kg sediment dw
- Extrapolation method:
- equilibrium partitioning method
Sediment (marine water)
- Hazard assessment conclusion:
- PNEC sediment (marine water)
- PNEC value:
- 0.178 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:
- 0.354 mg/kg soil dw
- Extrapolation method:
- equilibrium partitioning method
Hazard for predators
Secondary poisoning
- Hazard assessment conclusion:
- no potential to cause toxic effects if accumulated (in higher organisms) via the food chain
Additional information
Conclusion on classification
Short-term toxicity tests for algae and Daphnia are available, for fish a predicted value using ECOSAR was derived. The EC50 value for Daphnia is 43.7 mg/l, whereas the ErC50 for algae is 80 mg/L derived by read across to Dihydromyrcenol. Based on the lowest available acute data for fish with an LC50 value of 4.7 mg/L, the substance does not need to be classified for acute aquatic toxicity.
As only one chronic value is available (algae), the aquatic chronic classification needs to be derived on both chronic and acute toxicity data and the most stringent outcome needs to be taken into consideration. The lowest chronic available value is the NOEC of algae being 25 mg/L. In combination with the substance being readily biodegradable and the log Kow of 3.2, the substance does not need to be classified for chronic toxicity according to Figure 4.1.1 and Table 4.1.0 of CLP.
Overall, it can be concluded that Tetrahydromyrcenol does not need to be classified for the environment in accordance with the criteria outlined in EU CLP (1272/2008/EC and its updates).
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