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Physical & Chemical properties

Vapour pressure

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Endpoint:
vapour pressure
Type of information:
(Q)SAR
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
results derived from a valid (Q)SAR model and falling into its applicability domain, with adequate and reliable documentation / justification
Justification for type of information:
As the target substance is hydrolytically unstable with hydrolysis half-life less than 1 hr at 30°C, testing is not feasible. According to hydrolysis test results, the hydrolysis products have been identified to be 2-propanol, isostearic acid and titanium dioxide. The physical, toxicological and ecotoxicological properties of the organic parts have been well-investigated. Read-across approach from hydrolysis products are used for assess the target substance.
QSAR modelling is used to calculate vapour of the hydrolysis products.
Qualifier:
according to
Guideline:
other: calculation
Principles of method if other than guideline:
Calculation based on MPBPWIN v1.43, Estimation Programs Interface Suite™ for Microsoft® Windows v4.10. US EPA
GLP compliance:
no
Type of method:
other: QSAR
Key result
Test no.:
#1
Temp.:
ca. 25 °C
Vapour pressure:
ca. 0 Pa
Conclusions:
The vapour pressure of the target substance was 0 Pa at 25°C by calculation.
Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
data from handbook or collection of data
Justification for type of information:
2-propanol is one of the hydrolysis product of the target substance which is expected to have high volatility.
Qualifier:
no guideline available
Principles of method if other than guideline:
Not specified. Data from collection of handbook.
GLP compliance:
not specified
Type of method:
other: not specified.
Key result
Test no.:
#1
Temp.:
ca. 25 °C
Vapour pressure:
ca. 60.2 hPa
Conclusions:
THe vapour pressure of 2-propanol is 60.2 hPa at 25°C according to literature.

Description of key information

The vapour pressure of the target substance is 0 Pa using QSAR calculation method. As the target substance hydrolyses rapidly to form 2 -propanol and isostearic acid, the physical property of the hydrolysis products are used for read-across. 2 -propanol, the product with high vapour pressure of 60.2 hPa. is used for CSA.

Key value for chemical safety assessment

Vapour pressure:
60.2 hPa
at the temperature of:
25 °C

Additional information