Registration Dossier
Registration Dossier
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EC number: 800-760-0 | CAS number: 68139-89-9
Surface tension
Administrative data
Link to relevant study record(s)
Description of key information
32,93mN/m
Key value for chemical safety assessment
- Surface tension:
- 32.93
Additional information
Measuring the surface tension of products with high viscosity is pretty challenging.
The length of the pipette was shortened to get a bigger drop.
The software is programmed to measure the immediate drop; however the drop had not enough time to be shaped because of the viscosity, thus gives us a wrong first measure.Indeed the first drop gives either a wrong surfactant profile (high first surface tension measurement with regular lower next measurements) or a very low first measure.
A manual drop method was chosen in order to adjust the time for starting the program and avoid the uneven first measurement. It remains some uneven measurements, yet.
Based on those 4 series, the average of the surface tension is 393mN 2,/m, without the first measure, the average becomes 32,92mN/m.
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