Registration Dossier
Registration Dossier
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EC number: 220-120-9 | CAS number: 2634-33-5
Ecotoxicological Summary
Administrative data
Hazard for aquatic organisms
Freshwater
- Hazard assessment conclusion:
- PNEC aqua (freshwater)
- PNEC value:
- 4.03 µg/L
- Assessment factor:
- 10
- Extrapolation method:
- assessment factor
- PNEC freshwater (intermittent releases):
- 1.1 µg/L
Marine water
- Hazard assessment conclusion:
- PNEC aqua (marine water)
- PNEC value:
- 0.403 µg/L
- Assessment factor:
- 100
- Extrapolation method:
- assessment factor
- PNEC marine water (intermittent releases):
- 110 ng/L
STP
- Hazard assessment conclusion:
- PNEC STP
- PNEC value:
- 1.03 mg/L
- Assessment factor:
- 10
- Extrapolation method:
- assessment factor
Sediment (freshwater)
- Hazard assessment conclusion:
- PNEC sediment (freshwater)
- PNEC value:
- 49.9 µg/kg sediment dw
- Extrapolation method:
- equilibrium partitioning method
Sediment (marine water)
- Hazard assessment conclusion:
- PNEC sediment (marine water)
- PNEC value:
- 4.99 µg/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:
- 3 mg/kg soil dw
- Assessment factor:
- 10
- Extrapolation method:
- assessment factor
Hazard for predators
Secondary poisoning
- Hazard assessment conclusion:
- no potential for bioaccumulation
Additional information
Conclusion on classification
BIT did not fulfill the strict conditions of ready biodegradability tests to be considered readily biodegradable. On inherent biodegradability tests, BIT was also not considered inherently biodegradable. In aquatic systems with estuarine and sea water, BIT can be degraded rapidly with half-lives at 12ºC of 2-3 days in estuarine water and 5-12 days in sea water. In sandy loam soils the resulting half-lives were 9-14 hours.This means the substance is demonstrated to be ultimately degraded in a surface water simulation test with a half-life of < 16 days (corresponding to a degradation of >70 % within 28 days); thus it can be considered that BIT is rapidly degradable.
There are adequate chronic toxicity data available. The algae demonstrated to be the most sensitive trophic level regarding long-term effects with
a 72-hour NOEC of 0.0403 mg BIT/L. This value is < 0.1 mg/L, thus Chronic Category 2 is applied.
Further, based on the EU CLP (EC/1272/2008) Guidance document, an M-factor of 1 for Aquatic Acute 1 and an M-factor of 1 for Aquatic Chronic classification can be proposed for the substance based on the EC/LC50 and NOEC/EC10 values from the available toxicity studies.
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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