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Physical & Chemical properties

Vapour pressure

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Reference
Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Study period:
May 2007
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: Data generated according to internationally accepted testing guidelines (OECD TG 107). Although this study has not been performed according to GLP, the test method and results are well described.
Qualifier:
according to
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Deviations:
no
GLP compliance:
no
Type of method:
static method
Temp.:
20 °C
Vapour pressure:
0.009 hPa
Transition / decomposition:
no
Conclusions:
The vapour pressure determined at 20°C is 0.9 Pa.
Executive summary:

Vapour pressures of paramethoxyphenol (CAS 150-76-5) were measured. Product purity was 99.5%.

A static method, specially developed for very low pressures was used as suggested by OECD guidelines (chemicals measurement n°104).

Vapour pressures were measured at 4 temperatures in the temperature range 50 - 20 °C. Data were checked with the

Antoine law.

The linearity of the vapour pressure curve (logP versus 1/T curve) has been checked, with an R² = 0.9913.

The vapour pressure determined at 20°C is 0.9 Pa.

Description of key information

One key study, reliability 1, conducted according to standardised guidelines.
Vapour pressure = 0.9 Pa at 20°C

Key value for chemical safety assessment

Vapour pressure:
0.9 Pa
at the temperature of:
293.15 K

Additional information

A supporting study (reliability 2) from a Handbook shows a vapour pressure< 0.0133 hPa at 25°C.