Registration Dossier
Registration Dossier
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EC number: 214-688-7 | CAS number: 1185-81-5
Ecotoxicological Summary
Administrative data
Hazard for aquatic organisms
Hazard for air
Hazard for terrestrial organisms
Hazard for predators
Additional information
Conclusion on classification
Classification and labelling has been based upon the key information for the ecotoxicity endpoints. The results of these studies are as follows:
48 hour EC50 (Daphnia): 0.11 mg/l (Rasnake et al, 2010)
72 hour EC50 (algae): >1.6 mg/l (Steger-Hartmann T 1999)
The substance has been determined to have a log pow of 3.11 (Woolley & O'Connor, 2010) and a water solubility of less than 1 mg/L (Woolley & O'Connor, 2010). It should also be considered that the substance does not meet the definition of a readily biodegradable substance according to the Hanstveit, 2003 read-across study in section 5.2.1.
The 48-hour EC50 (Daphnia) value (0.11 mg/l) along with the results for partition coefficient and ready biodegradability are considered suitable for use for classification and labelling and this meets the criteria under 67/548/EEC and EC Regulation 1272/2008 as follows:
67/548/EEC:
R50/R53: Toxic to aquatic organisms and May cause long-term adverse effects to the aquatic environment.
EC Regulation 1272/2008:
Hazardous to the aquatic environment, Acute: Category 1 and Chronic: Category 1
It should also be noted that in line with the Summary Record of the Technical Committee on the Classification and Labelling of Dangerous Substances, Meeting on Environmental Effects of Existing Chemicals, Pesticides and New Chemicals, JRC Ispra – January 25 2007, the Final Conclusion reached by the ECB was that organotin salts should be classified as N, R50-53 and hence based on the Committee's decision it is considered that the overriding classification for all dibutyltin substances is as follows:
Dibutyltin salts
Classification S -phrases / |
Toxicity |
Degradation |
Bioaccumulation |
Escape clause |
N; R50-53 S 60-61
|
0.01 < L(E)C50 ≤ 1.0 (mg/l) (based on read across) |
Not readily degradable (based on read across)
|
Not relevant
|
|
Specific concentration limits: |
Not applicable |
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