Registration Dossier
Registration Dossier
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EC number: 202-525-2 | CAS number: 96-69-5
Ecotoxicological Summary
Administrative data
Hazard for aquatic organisms
Freshwater
- Hazard assessment conclusion:
- PNEC aqua (freshwater)
- PNEC value:
- 0 mg/L
- Assessment factor:
- 50
- Extrapolation method:
- assessment factor
- PNEC freshwater (intermittent releases):
- 0.002 mg/L
Marine water
- Hazard assessment conclusion:
- PNEC aqua (marine water)
- PNEC value:
- 0 mg/L
- Assessment factor:
- 500
- Extrapolation method:
- assessment factor
STP
- Hazard assessment conclusion:
- no data available: testing technically not feasible
Sediment (freshwater)
- Hazard assessment conclusion:
- PNEC sediment (freshwater)
- PNEC value:
- 5.77 mg/kg sediment dw
- Extrapolation method:
- equilibrium partitioning method
Sediment (marine water)
- Hazard assessment conclusion:
- PNEC sediment (marine water)
- PNEC value:
- 0.577 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:
- 1.15 mg/kg soil dw
- Extrapolation method:
- equilibrium partitioning method
Hazard for predators
Secondary poisoning
- Hazard assessment conclusion:
- PNEC oral
- PNEC value:
- 2 mg/kg food
- Assessment factor:
- 300
Additional information
Conclusion on classification
The environmental classification of 4,4'-sulfanediylbis(2-tert-butyl-5-methylphenol) is currently not harmonized according to the CLP Regulation (EC) 1272/2008 and the Dangerous Substance Directive 67/548/EC.
Short-term toxicity tests resulted in L(E)C50 values below 1 mg/L for both fish (LC50(96h) = 0.14 mg/L) and daphnids (EC50(48h) = 0.16 mg/L). Long-term studies are not available. Based on these results and due to the fact that 4,4'-sulfanediylbis(2-tert-butyl-5-methylphenol) is not readily biodegradable, this substance should be classified in Acute Category 1 and Chronic Category 1 for the aquatic environment according to Annex 1 (section 4.1.2.6) of the CLP Regulation.
Based on the same criteria the substance should be classified with R50 and R53 under the Dangerous Substance Directive 67/548/EC (see Annex VI section 5.2.1.2).
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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