Registration Dossier
Registration Dossier
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EC number: 405-800-7 | CAS number: 27955-94-8 THPE; TRIS(P-HYDROXYPHENYL)ETHANE; TRIS(PARA-HYDROXYPHENYL)ETHANE
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:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.5 (Surface Tension)
- Deviations:
- no
- Remarks:
- The study was conducted according to the guideline in effect at the time of study conduct.
- GLP compliance:
- yes
- Type of method:
- OECD harmonised ring method
- Surface tension:
- 71.6 mN/m
- Temp.:
- 25.5 °C
- Conc.:
- 22.6 mg/L
- Conclusions:
- The surface tension of a 90% saturated aqueous solution of the test substance was determined as 71.6 mN/m at 25.5°C.
- Executive summary:
The surface tension of a 90% saturated aqueous solution of the test substance was determined according to EEC Directive 67/548, Annex V, A5. The test was performed with a direct reading surface tension/torsion balance using the OECD harmonised ring method. A portion of the test substance (0.10390 g) was combined with distilled water (100 mg) and the mixture stirred at 20°C overnight. The mixture was then stirred for 3 hours at room temperature. Undissolved test substance was removed by centirfugation, with final traces being separated from the supernatant by filtration through a Whatman GF/F filter. All distilled water used in the test was also filtered. An aqueous solution at 90% of saturation was made up using the saturated test solution and filtered water. A small amount of the calibration water or test solution was poured into the concave measuring dish. The surface tension was measured at intervals until a constant reading was obtained at least 3 times in succession. Readings were taken at the maximum force required to detach the ring from the surface of the liquid. The surface tension of a 90% saturated aqueous solution of the test substance was 71.6 mN/m at 25.5°C.
Reference
Description of key information
EU Method A.5
Key value for chemical safety assessment
Additional information
71.6 mN/m for a 90% saturated aqueous solution at 25.5°C
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