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EC number: 420-380-5
CAS number: 136465-81-1
The gauging factor (C) was determined to be 1.01. Four consecutive
measurements were performed on the 1.0 g/L solution of
PTH-Decahydroamide and the gauging factor applied to get the corrected
surface tension. A constant value of 51.9 mN/m at 20 °C was determined
for the corrected surface tension.
Equilibration Time at 20 ⁰C (minutes)
Measured Surface Tension (mN/m)
Corrected Surface Tension (mN/m)
Based on the criteria as outlined in the EC guideline A.5, it is
concluded that PTH-decahydroamide (Ro 319373/000) should be regarded as
a surface active material.
The determination of the surface tension of an aqueous solution of
PTH-decahydroamide (Ro 31 -9373/000) was performed using EC directive
92/69/EEC, A.5 (1992).
The surface tension of a 1 g/L solution of PTH-decahydroamide (Ro 31
-9373/000) was determined to be 51.9 mN/m. Based on the criteria as
outlined in the EC guideline A.5, it was concluded that
PTH-decahydroamid (Ro 319373/000) should be regarded as a surface active
This conclusion is in agreement with the foaming phenomenon observed
when PTH-decahydroamide (Ro 31 -9373/000) is strongly agitated in
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