Registration Dossier

Administrative data

Link to relevant study record(s)

Description of key information

Key value for chemical safety assessment

Additional information

No information is available for phototransformation in water.

This is not expected to be a significant removal process for dichloro(methyl)(phenyl)silane or methylphenylsilanediol. Experiments carried out for dimethylsilanediol indicate that water soluble small molecule silanols will undergo aqueous photolytic oxidative demethylation with tropospheric ultraviolet radiation in the presence of suitable chromophores, such as nitrogen oxides, to give silicic acid and carbon dioxide (Buch et al 1984).

Whilst such degradation is possible for propylsilanetriol, it is not taken into account in the exposure assessment.

Reference:

Buch RR, Lane TH, Annelin RB, Frye CL, Photolytic Oxidative Demethylation of Aqueous Dimethylsiloxanols, Environmental Toxicology and Chemistry, Vol 3, pp 215-222, 1984