Registration Dossier

Physical & Chemical properties

Vapour pressure

Currently viewing:

Administrative data

Link to relevant study record(s)

Description of key information

The vapour pressure was determined to be 0.0104Pa at 25°C.

Key value for chemical safety assessment

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

Additional information

The vapour pressure of the test substance Benzyl salicylate was determined in a non-GLP experiment following to a large extent the principles of the gas saturation method described in OECD TG 104. A defined amount of test material was filled into a closed vessel and a headspace was allowed. The vessel was placed in a water bath and kept at a constant temperature until an equilibrium between the test material and the gas phase was achieved. Subsequently, air was slowly drawn from the headspace at a constant flow rate (normally between 5 to 8 mL/min) and replaced with air filtered through active carbon. For substances with vapour pressures below 0.1 Pa, a total sample volume of 1000 mL is normally used. The sampled headspace air containing the test substance was then led through an absorbent material (Porapak Q) to trap the test substance. The test substance was extracted from the absorbent by use of an appropriate solvent. The amount of trapped substance was determined by gas chromatography and the vapour pressure was calculated by using the equation ps = (ms x R x T)/(M x V). The measured vapour pressure of Benzyl salicylate was 0.0104 Pa at 25 °C (mean of nine measurements) and the relative standard deviation was 2.48%.