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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)
Remarks:
Migrated phrase: estimated by calculation
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: generally accepted calculation method
Qualifier:
according to
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Deviations:
no
GLP compliance:
no
Type of method:
other: calculation method
Temp.:
20 °C
Vapour pressure:
0 atm
Temp.:
20 °C
Vapour pressure:
0.189 Pa
Transition / decomposition:
yes
Transition temp.:
>= 220 °C
Conclusions:
The vapour pressure calculated for the substance is 0.189 Pa (20 °C)
Executive summary:

The vapour pressure of the substance was determined according to OECD Guideline 104 (vapour pressure), adopted on 23 March 2006. Isolation of the substance from the commercial product in a degree of purity that would allow the determination of its vapour pressure by experimental means is technically not possible. Therefore the vapour pressure of the substance was determined according to the Estimation Method (modified Watson correlation) described in the Annex to OECD Guideline 104.

The only experimental data required is the normal boiling point. No boiling point could be determined for the substance. Instead decomposition started at 220 °C. This temperature was considered to be the lowest possible boiling temperature. The vapour pressure obtained by calculation is 1.87 x 10E-6 atm (= 0.189 Pa) at 20 °C.

Description of key information

The vapour pressure calculated for the substance is 0.189 Pa (20 °C)

Key value for chemical safety assessment

Vapour pressure:
0.189 Pa
at the temperature of:
20 °C

Additional information