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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Surface tension

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Description of key information

The true surface tension of a 9:1 dilution of a saturated C6 Pyrazole Hemisulfate solution was determined to be 62.9 ± 2.0 dynes/cm at a temperature of 20°C, which indicates that the test substance is not surface active

Key value for chemical safety assessment

Surface tension:

Additional information

The surface tension of1-hexyl-1H-pyrazol-4,5-diamine hemisulfate was determined according to the OECD guideline 115 (OECD harmonized ring method) and following the GLP.

The surface tension of 1-hexyl-1H-pyrazol-4,5-diamine hemisulfate was 62.9 ± 2.0 dyne/cm corresponding to 62.9 mN/m (Coefficient of variation : 3.2) measured on a saturated solution at 90%.