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Registration Dossier
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EC number: 500-234-8 | CAS number: 68891-38-3 1 - 2.5 moles ethoxylated
Surface tension
Administrative data
Link to relevant study record(s)
- Endpoint:
- surface tension
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 19 Feb 2009
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- test procedure in accordance with national standard methods with acceptable restrictions
- Qualifier:
- according to guideline
- Guideline:
- other: DIN EN 14370 ''Surface Active Agents - Determination of Surface Tension''
- GLP compliance:
- no
- Type of method:
- ring method
- Surface tension:
- 33 mN/m
- Temp.:
- 25 °C
- Conc.:
- 721 mg/L
Reference
Two measurements with 6 points for calculation of standard deviationn for each were performed:
|
Measurement 1 |
Measurement 1 |
Concentration (mg/l) |
1000.5 |
999.9 |
Total no. of points |
6 |
6 |
Standard deviation (mN/m) |
0.04 |
0.09 |
Surface tension (Zuidema-Waters) (mN/m) |
33.39 |
33.40 |
Average value of two measurements (mN/m) |
33.4 |
|
Description of key information
The surface tension is 33.4 mN/m at 25 °C (c = 721 mg/L, DIN EN 14370).
Key value for chemical safety assessment
- Surface tension:
- 33.4
- in mN/m at 20°C and concentration in mg/L:
- 721
Additional information
The value for surface tension is taken from company data.
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