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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

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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
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
data from handbook or collection of data
Peer-reviewed assessment report (attached in section 13)
according to guideline
EPA OPPTS 830.7950 (Vapor Pressure)
Version / remarks:
old Guideline number given in assessment report (US EPA PAG 63-9)
GLP compliance:
Type of method:
gas saturation method
Specific details on test material used for the study:
Purity: 99.1%
Key result
25 °C
Vapour pressure:
0.035 Pa
As information was provided via a peer-reviewed assessment report, it can be considered as sufficiently reliable. The measured vapour pressure of ethoxyquin is 3.46 x 10-2 Pa at 25 °C.
Executive summary:

A study according to EPA OPPTS 830.7950 (GLP) has been conducted to determine the vapour pressure. The measured vapour pressure of ethoxyquin is 0.0346 Pa at 25 °C.

Description of key information

The measured vapour pressure of ethoxyquin is 3.46 x 10-2 Pa at 25 °C.

Key value for chemical safety assessment

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

Additional information