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Physical & Chemical properties

Vapour pressure

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vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Study period:
May 2007
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.
according to guideline
OECD Guideline 104 (Vapour Pressure Curve)
GLP compliance:
Type of method:
static method
20 °C
Vapour pressure:
0.009 hPa
Transition / decomposition:
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.