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EC number: 203-232-2 | CAS number: 104-74-5
Surface tension
Administrative data
Link to relevant study record(s)
- Endpoint:
- surface tension
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- test procedure in accordance with national standard methods
- Justification for type of information:
- Data is from experimental report
- Qualifier:
- according to guideline
- Guideline:
- other: ISO 9101:1987Surface active agents: Determination of interfacial tension -Drop volume method.
- Principles of method if other than guideline:
- The surface tension of a liquid test chemical is an environmentally relevant physical chemical property because Surface tension depends on the nature of the liquid, the surrounding environment and temperature. Liquids where molecules have large attractive intermolecular force will have a large surface tension.
- GLP compliance:
- no
- Type of method:
- other: drop count by stalagmometer
- Key result
- Surface tension:
- 23.17 mN/m
- Temp.:
- 20 °C
- Remarks on result:
- other: Surface tension of test chemical was reported to be 23.17 mN/m
- Conclusions:
- Surface tension of test chemical was determined to be 23.17 mN/m at 20 deg c 965.0 hPa.
- Executive summary:
A study was performed to determine the surface tension of test chemical at atmospheric pressure. The study was conducted in accordance with ISO 9101:1987 Surface active agents: Determination of interfacial tension -Drop volume method. The mean surface tension was determined to be 23.17 mN/m at 20 °C and 965.0 hPa.
Reference
observation table -
| Density of Test Chemical in g/cm³ | 0.5184 |
| Surface tension of water at 20 °C | 72.86 |
| Density of water at 20 °C | 0.9982 |
| Method Details | Observations |
Remarks if, any |
|
Atmospheric pressure(Mean) |
hPa |
965.0 |
|
No. of drops of water (nw)(Mean) |
|
57.6 |
|
No. of drops of test chemical (nl)(Mean) |
|
94 |
|
¥l= surface tension of test chemical
¥w = surface tension of water
ρl= density of test chemical
ρw =density of water
nl= no. of drops of test chemical
nw = no. of drops of water
¥l=0.5184X57.6X72.86
0.9982X94
¥l = 2,173.91 / 93.83
¥l = 23.17
dynes/cm
Description of key information
Surface tension of test chemical was determined to be 23.17 mN/m at 20 deg c 965.0 hPa.
Key value for chemical safety assessment
- Surface tension:
- 23.17
Additional information
A study was performed to determine the surface tension of test chemical at atmospheric pressure. The study was conducted in accordance with ISO 9101:1987 Surface active agents: Determination of interfacial tension -Drop volume method. The mean surface tension was determined to be 23.17 mN/m at 20 °C and 965.0 hPa.
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