Registration Dossier
Registration Dossier
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EC number: 601-747-0 | CAS number: 120939-52-8
Ecotoxicological Summary
Administrative data
Hazard for aquatic organisms
Hazard for air
Hazard for terrestrial organisms
Hazard for predators
Additional information
Conclusion on classification
Degradation:
Hydrolysis: 1.6 h at pH 7 (QSAR)
Biodegradation: not readily biodegradable based on read across from CAS 31024-56-3
Bioaccumulation:
N-{3-[dimethoxy(methyl)silyl]propyl}butan-1-amine (CAS 120939-52-8): not relevant due to fast hydrolysis
Silanol hydrolysis product [3-(butylamino)propyl](methyl)silanediol: Log Kow = 1.0 (QSAR)
Aquatic acute toxicity
Aquatic invertebrates: EC50 (48 h) > 100 mg/L (nominal, OECD 202, Daphnia magna)
Algae/aquatic plant: ErC50 (72 h) > 100 mg/L (nominal, OECD 201, Pseudokirchneriella subcapitata)
Aquatic chronic toxicity
Algae/aquatic plant: NOErC (72 h) = 29.2 mg/L (nominal, OECD 201, Pseudokirchneriella subcapitata)
Classification according to CLP
N-{3-[dimethoxy(methyl)silyl]propyl}butan-1-amine (CAS 120939-52-8) hydrolyses rapidly to [3-(butylamino)propyl](methyl)silanediol and methanol. The silanol hydrolysis product is not considered to be rapidly degradable and not bioaccumulative. Acute toxicity data are available for aquatic invertebrates and algae while long term toxicity data are available only for algae. In both trophic levels the EC50 value was higher than 100 mg/L. In the algae study an EC10 value of 29.2 mg/L was determined. On this basis N-{3-[dimethoxy(methyl)silyl]propyl}butan-1-amine (CAS 120939-52-8) is not classified and labeled according to the consolidated version of Regulation (EC) No 1272/2008 and further amendments (ATPs).
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