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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Diss Factsheets

Physical & Chemical properties

Surface tension

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surface tension
Type of information:
experimental study
Adequacy of study:
key study
Study period:
no data
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
guideline study with acceptable restrictions
valid with restriction; meets generally accepted scientific standards, well documented and acceptable for assessment. The purity of the substance is not reported. However, substance purity is not relevant for this endpoint as potential impurities are not expected to lead to a decrease in surface activity but, in a worst-case, contribute to the surface activity of the main component.
equivalent or similar to guideline
OECD Guideline 115 (Surface Tension of Aqueous Solutions)
according to guideline
other: Testguideline A80/17 (Dez.1979)
GLP compliance:
Type of method:
OECD harmonised ring method
Key result
Surface tension:
ca. 65.4 mN/m
20 °C
1 g/L
The surface tension of thiourea was determined to be 65.4 mN/m.
Executive summary:

The surface tension of 1 g/l thiourea was determined according the OECD harmonized ring method at 20°C. The testguideline A80/17 (Dez. 1979) was followed. The surface tension of thiourea is 65.4 mN/m.

Description of key information

The surface tension of thiourea in aqueous solution at 20°C is 65.4 mN/m.

Key value for chemical safety assessment

Surface tension:
in mN/m at 20°C and concentration in mg/L:
1 000

Additional information

According the study published by Korte und Greim (1981) the surface tension of 1 g/l thiourea which was determined according the OECD harmonized ring method at 20°C is 65.4 mN/m. The test guideline A80/17 (Dez. 1979) was followed.