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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

The calculated vapour pressure is 1.63 * 10-12 Pa. The information is based on read across to the corresponding substance with sodium as cationic part instead of potassium.

Key value for chemical safety assessment

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

Additional information

Docusate Sodium is a salt. From salts it is known that they have very low vapour pressures making the practical determination of its vapour pressures experimentally very difficult and often not possible.

In the Klimisch 2 key study from Holzschuh (2010) Docusate Sodium starts loosing volatile components at 60°C and decomposes at > 200°C. In the light of the expected low vapour pressure, this made the experimental determination impossible. Therefore, the vapour pressure was calculated using EPIWIN 4.00 with the module MPBPVP (v1.43). The calculated vapour pressure is 1.63 · 10-12Pa (Modified Grain method).

Since Docusate Sodium is a salt, a low value was expected and hence the calculated value of 1.63*10 -12 Pa is considered relevant and reliable for the further risk assessment.

The field "Value used for the CSA" in this endpoint summary does not allow entering values lower than 0.000000001 Pa (=10 -9 Pa). Therefore, a worst case value of 0.000000001 Pa was entered in this field for completeness.