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Physical & Chemical properties

Vapour pressure

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Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Well-documented scientific publication.
Principles of method if other than guideline:
Method: other (measured): Kroeger and Soerstroem
GLP compliance:
not specified
Type of method:
other: measured
Key result
Temp.:
1 172 °C
Vapour pressure:
0.002 hPa

The vapour pressure at environmental temperatures is negligibly low and  thus not relevant.

Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
supporting study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Well-documented scientific publication.
Principles of method if other than guideline:
Method: other (measured): Kroeger and Soerstroem
GLP compliance:
not specified
Type of method:
other: measured
Temp.:
1 165 °C
Vapour pressure:
0.003 hPa

Description of key information

0.0016 hPa at 1172 °C

Key value for chemical safety assessment

Additional information

However, according to REACh legislation, Annex VII, 7.5, column 2, the study does not need to be conducted, since the melting point of sodium silicate is far above 300 °C.