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Vapour pressure
Administrative data
Link to relevant study record(s)
Description of key information
Expert Statement
on the
Vapour Pressure of
FAT 40853/A TE
Date of Expert Statement: January 23, 2012
Key value for chemical safety assessment
Additional information
The vapour pressure values (20°C) of the main constituent of test substance
Program
Substance |
MPBPVP |
SPARC |
FAT 40853/A TE |
0 Pa at 20 °C |
Addl. Input data: Assumed Melting Point: 400 °C
Output: 0 Pa at 20 °C |
Estimation of the vapour pressure of the inorganic impurities of the test substance FAT 40853/A TE through computational methods
The test substance FAT 40853/A TE consists of about 24.5 % inorganic impurities. These inorganic impurities are sodium or calcium salts (sulphate, chloride, fluoride or hydrogenphosphate). The vapour pressure of these inorganic salts is in most cases below 10-10Pa and thus negligible.
Estimation of the vapour pressure of the known organic impurities of the test substance FAT 40853/A TE through computational methods
The test substance FAT 40853/A TE contains four known organic by-products (about 17 %). The molecular structure of these by-products is similar to the structure of the main constituent. Accordingly the vapour pressure of these compounds is assumed to be in the same magnitude as the vapour pressure of the main constituent.
Conclusion
The calculations of the vapour pressure for the test substance resulted in the following range of values when performed with programs MPBPVP and SPARC.
FAT 40853/A TE:
Vapour Pressure < 1* 10-10Pa
The vapour pressure of the known inorganic impurities and of the known organic by-products is as well calculated to be below< 1* 10-10Pa
The vapour pressure of the test substance FAT 40853/A TE is therefore expected to be negligible.
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