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Description of key information

Key value for chemical safety assessment

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The transition of a substance from the water phase to the gas phase can be estimated by the Henry’s Law Constant (HLC). No measured value for this parameter is available. The HLC can be estimated from the ratio of the vapour pressure to the water solubility.

HLC = (VP*MW) / WS

Volatilisation from water is not relevant for dimethoxymethylsilane (CAS 16881 -77-9) due to its rapid hydrolysis in contact with water (calculated half-life of 0.3 h).

The HLC value for methylsilanetriol at 12 °C was predicted to be 2.3 E-06 Pa m3mol-1 (EUSES 2.1.1).