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Physical & Chemical properties

Vapour pressure

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Reference
Endpoint:
vapour pressure
Type of information:
calculation (if not (Q)SAR)
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
accepted calculation method
Justification for type of information:
The vapor pressure value has been estimated using MPBPVPWIN v.1.43; details on method and results are given below.
Principles of method if other than guideline:
The value has been calculated according to the modified Grain method, which is a modification and significant improvement of the modified Watson method, reported into the OECD guideline 104.
GLP compliance:
no
Type of method:
other: modified Grain calculetion method
Temp.:
25 °C
Vapour pressure:
0 Pa

The calculation has been performed setting as input data in the tool the known experimental physicochemical properties of the substance.

VP (mm Hg, 25 °C): 5.31E-010 (Modified Grain method)

VP (Pa, 25 °C): 7.08E-008 (Modified Grain method)

Conclusions:
Vapour pressure can be considered as negligible (7.08E-008 Pa at 25 °C)
Executive summary:

The vapour pressure of the substance has been calculated by MPBPVPWIN v1.43 estimation tool*. The value has been calculated according to the modified Grain method, which is a modification and significant improvement of the modified Watson method, reported into the OECD guideline 104. It is applicable to solids, liquids and gases. Currently there is no universally accepted definition of model domain.

The calculation has been performed setting as input data in the tool the known experimental physicochemical properties of the substance.

The following values were estimated: vapour pressure of 5.31E-010 mm Hg at 25 °C and 7.08E-008 Pa at 25 °C.

Conclusion

Vapour pressure can be considered as negligible (7.08E-008 Pa at 25 °C)

*MPBPVPWIN v1.43 is an application contained in the EpiSuite 4.1, the suite of physical/chemical property and environmental fate estimation programs developed by the EPA’s Office of Pollution Prevention Toxics and Syracuse Research Corporation (SRC).

Description of key information

Vapour pressure can be considered as negligible (7.08E-008 Pa at 25 °C)

Key value for chemical safety assessment

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

Additional information

Although the substance melting point is under 300 °C, the DSC analysis shows that either boiling point, neither endothermic reactions attributable to transition phase(s) were recorded after melting up to 500 °C. Therefore, the vapor pressure value has been estimated using MPBPVPWIN v.1.43.

The value has been calculated according to the modified Grain method, which is a modification and significant improvement of the modified Watson method, reported into the OECD guideline 104. It is applicable to solids, liquids and gases. Currently there is no universally accepted definition of model domain.

The calculation has been performed setting as input data in the tool the known experimental physicochemical properties of the substance.

Teh following values were estimated: vapour pressure of 5.31E-010 mm Hg at 25 °C and 7.08E-008 Pa at 25 °C.