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EC number: 404-360-3 | CAS number: 119313-12-1 CG 25-369; IRGACURE 369; TK 11-319
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:
- 1988
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- guideline study with acceptable restrictions
- Qualifier:
- according to guideline
- Guideline:
- other: - EEC Directive 84/449, A.5 "Oberflachenspannung" (Amtsblatt der EG L 2S1/37, 19.9.84, Ringmethode) and ISO 304 ("Surface active agents - Determination of Surface Tension by Drawing up Liquid Films") 1978
- Deviations:
- yes
- Remarks:
- - using the Wilhelmy plate method instead of ring method
- Principles of method if other than guideline:
- As an alternative to the ring method, which is primarily suggested by the test guideline, we prefer to use the Wilhelmy plate method because it allows a better assessment of the time dependence of the surface tension, if present.
- GLP compliance:
- no
- Type of method:
- plate method
- Surface tension:
- >= 59.1 - <= 64.7 mN/m
- Temp.:
- 20 °C
- Conc.:
- 10 g/L
- Conclusions:
- The surface tension of test substance was determined to be 59 - 65 mN/m at 20°C (Filtrates of 10.0 g/L suspensions)
- Executive summary:
In this study conducted to generally accepted scientific standards (EU A. 5) the test material (EC 404-360-3) was determined to have a surface tension of 59 - 65 mN/m at 20°C (Filtrates of 10.0 g/L suspensions)
Reference
Slightly time dependence of surface tension was observed.
| Exp. 1 | |||
| Concentration (g/L) | σ solution | σ corr. for Ob (mN/m) | |
| minutes | readings | ||
| Filtrate of a 10.0 g/L suspension | 0 | 65.45 | 64.7 |
| 1 | 64.5 | 63.8 | |
| 5 | 63.4 | 62.7 | |
| 10 | 62.75 | 62.0 | |
| Exp. 2 | |||
| Concentration (g/L) | σ solution | σ corr. for Ob (mN/m) | |
| minutes | readings | ||
| Filtrate of a 10.0 g/L suspension | 0 | 62.4 | 61.7 |
| 1 | 61.55 | 60.8 | |
| 5 | 60.45 | 59.8 | |
| 10 | 59.8 | 59.1 | |
According to the manufacturer of the apparatus, Harkins and Jordan correction is not necessary for the Wilhelmy plate method.
Description of key information
Study conducted to generally accepted scientific standards
Key value for chemical safety assessment
- Surface tension:
- 59
- in mN/m at 20°C and concentration in mg/L:
- 10 000
Additional information
The surface tension was measured by the Wilhelmy plate method.
59 - 65 mN/m at 20°C (Filtrates of 10 g/L suspensions)
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