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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
(v1.43)

SPARC
(October 2011 release w4.61691-s4.6.1687)

FAT 40853/A TE

0 Pa at 20 °C
(Modified Grain Method)

Addl. Input data:

Assumed Melting Point: 400 °C
(Results of IBACON Study Reference 6825180)

 

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.