Registration Dossier
Registration Dossier
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EC number: 215-199-1 | CAS number: 1312-76-1
Vapour pressure
Administrative data
Link to relevant study record(s)
- Endpoint:
- vapour pressure
- Data waiving:
- study scientifically not necessary / other information available
- Justification for data waiving:
- other:
- Endpoint:
- vapour pressure
- Type of information:
- experimental study
- Adequacy of study:
- other information
- 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
Referenceopen allclose all
RM-Freetext:
The vapour pressure at environmental temperatures is negligibly low and thus not relevant.
RM-Freetext:
The vapour pressures of potassium silicates have not been determined, but they are not expected to vary significantly from those established for the respective sodium silicates:
molar ratio (SiO2:Na2O) vapour pressure at °C
-----------------------------------------------------------
1.0 0.0103 hPa 1175
2.0 0.0031 hPa 1165
3.0 0.0016 hPa 1172
Description of key information
0.0103 hPa at 1175 °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.
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