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Physical & Chemical properties

Vapour pressure

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Description of key information

Vapour pressure (substance): 39 mbar at 20°C
Vapour pressure (silanol hydrolysis products):

Key value for chemical safety assessment

Vapour pressure:
39 hPa
at the temperature of:
20 °C

Additional information

A vapour pressure value of 39 mbar is reported at 20°C. Extrapolation of experimental data measured at temperatures ranging from 35 to 117°C was used to dermine this vapour pressure. The robust study summary is based upon a german handbook. The handbook provides the Antoine vapour pressure correlation, but full details were not available. Consequently, the reliability of the data is with restrictions.

The vapour pressures of the constituents of the substance were also obtained, using an appropriate test protocol or an appropriate QSAR method. The vapour pressure of MS-Silane constituents range from 463.21 hPa to 146.26 hPa at 20°C. The mean value of 117.19 hPa at 20°C supports the result of the key study. The vapour pressure of the hydrolysis products for the constituents of MS-Silane, obtained with the same QSAR method, are negligible.

146.26 hPa (dichloro(dimethyl)silane CAS 75 -78 -5)

46321 Pa (dichloro(methyl)silane CAS 75 -54 -7)

291.9 hPa (silicon tetrachloride CAS 10026 -04 -7)

27865 Pa (209 mmHg) (chlorotrimethylsilane CAS 75 -77 -4)

2167 Pa (dichloro(ethyl)(methyl)silane CAS 4525 -44 -4)

12000 Pa (hexamethyldisilane CAS 1450 -14 -2)

4067 Pa (1,2 -dichlorotetramethyldisilane CAS 4342 -61 -4)

400 Pa (1,3 -dichloro-1,1,3,3 -tetramethyldisiloxane CAS 2401 -73 -2)

6892 Pa (Chloropentamethyldisilane CAS 1560 -28 -7)

2391 Pa (Chloro(dimethyl)[(trimethylsilyl)methyl]silane CAS 13683 -11 -9)

2293 Pa (1 -chloro-1,1,3,3,3 -pentamethyldisiloxane CAS 2943 -62 -6)

1387 Pa (dichloromethylsilyl)methyl trimethylsilane

2752 Pa (dichloro(methyl)(propyl)silane CAS 4518 -94 -9)