Registration Dossier
Registration Dossier
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EC number: 261-596-8 | CAS number: 59086-80-5
Ecotoxicological Summary
Administrative data
Hazard for aquatic organisms
Hazard for air
Hazard for terrestrial organisms
Hazard for predators
Additional information
Conclusion on classification
Classification relevant information:
Degradation:
Hydrolysis: << 2 min
Biodegradation: not readily and not inherently biodegradable (41% after 28 d and 39% after 60 d, OECD 301F) based on read across from CAS 66604 -31 -7
Bioaccumulation:
Dichloromethyltetradecylsilane: not relevant due to fast hydrolysis
Silanol hydrolysis product: methyltetradecylsilanediol: Log Kow = 6 at 20°C (QSAR)
Aquatic acute toxicity
Fish: no data available
Aquatic invertebrates: no data available
Algae/aquatic plant: ErC50 (72 h) > 31.8 mg/L (nominal, methanol as solvent) and > 29.5 mg/L (nominal, TBA as solvent), (OECD 201, Scenedesmus subspicatus) based on read across from CAS 16415-12-6
Aquatic chronic toxicity:
Fish: no data available
Aquatic invertebrates: NOEC (21 d) = 10 mg/L (nominal, OECD 211, Daphnia magna) based on read across from CAS 16415-12-6
Algae/aquatic plant: ErC10 (72 h) = 31.8 mg/L (nominal, methanol as solvent) and 20.91 mg/L (nominal, TBA as solvent), (OECD 201, Scenedesmus subspicatus) based on read across from CAS 16415-12-6
Classification according to CLP
Dichloromethyltetradecylsilane (CAS 59086-80-5) hydrolyses vigorously to methyltetradecylsilanetriol and hydrochloric acid. The silanol hydrolysis product is not considered rapidly biodegradable. Acute toxicity data are available for algae while long term data are available for algae and aquatic invertebrates. No effects causing 50% inhibition to growth rate (ErC50) of aquatic algae were detected. Chronic aquatic toxicity data indicate no hazard within the range of water solubility. Therefore dichloromethyltetradecylsilane (CAS 59086-80 -5) is not classified and labeled according to the consolidated version of Regulation (EC) No 1272/2008 and further amendments (ATPs).
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