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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Physical & Chemical properties

Vapour pressure

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Reference
Endpoint:
vapour pressure
Type of information:
calculation (if not (Q)SAR)
Remarks:
Migrated phrase: estimated by calculation
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: acceptable calculation method
Qualifier:
no guideline followed
Principles of method if other than guideline:
Vapor Pressure is estimated by calculation. Three methods are employed; all three methods use the boiling point.
1.) Antoine method (reference: Chapter 14 of W.J. Lyman's book "Handbook of Chemical Property Estimation Methods", Washington, DC: American Chemical Society, 1990).
2.) Modified Grain method (reference: Page 31 of Neely and Blau's Environmental Exposure from Chemicals, Volume I, CRC Press, 1985)
3.) Mackay method (reference: Page 31-2 of Neely and Blau's Environmental Exposure from Chemicals, Volume I, CRC Press, 1985).
For solids, a melting point is required to adjust the vapor pressure from a subcooled (supercooled) liquid to a solid.  
Type of method:
other: calculation
Temp.:
25 °C
Vapour pressure:
0.001 Pa
Remarks on result:
other: EPISUITE estimation (modified Grain Method), value for liquids
Executive summary:

Vapour pressure of octanoic acid, monoester with glycerol was estimated to be 0.00116 Pa at 25°C using US EPA EPI Suite 4.11. Principle of calculation is the modified Grain method. Result is calculated for liquids (subcooled liquid VP).

Description of key information

Principle of calculation is the modified Grain method. Result is calculated for liquids (subcooled liquid VP).

Key value for chemical safety assessment

Vapour pressure:
0.001 Pa
at the temperature of:
25 °C

Additional information