Registration Dossier
Registration Dossier
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EC number: 200-900-5 | CAS number: 75-77-4
Toxicity to aquatic algae and cyanobacteria
Administrative data
Link to relevant study record(s)
Description of key information
No data are available for Chlorotrimethylsilane. A 72-hour EC50 value of >1053 mg/L and NOEC of 70 mg/L have however been determined for the effects of a read-across substance, Trimethylsilanol (CAS 1066-40-6), on growth rate of Selenastrum capricornutum (new name: Pseudokirchnerella subcapitata) based on intitial measured concentrations of the test substance. When expressed relative to mean measured concentrations the equivalent values are >750 mg/L and 50 mg/L.
Key value for chemical safety assessment
Additional information
No data for toxicity to toxicity to aquatic algae and cyanobacteria are available for Chlorotrimethylsilane. However a study of toxicity to Selenastrum capricornutum (new name: Pseudokirchnerella subcapitata) is available for the related substance Trimethylsilanol. Trimethylsilanol (CAS 1066-40-6) is the hydrolysis product of Chlorotrimethylsilane 75-77-4. The hydrolysis half-life of chlorotrimethylsilane (see Section 5.1.2) indicates that, under conditions relevant to the short-term test, hydrolysis to trimethylsilanol and hydrogen chloride will occur over the course of the test. Effects of hydrogen chloride on aquatic organisms are limited to those that result from changes to pH in unbuffered media and are discussed in the CSR.
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