Registration Dossier
Registration Dossier
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EC number: 274-417-3 | CAS number: 70210-20-7
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:
- 7 September - 1 November 2017
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 115 (Surface Tension of Aqueous Solutions)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.5 (Surface Tension)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- other: DIN EN 14370 Bestimmung der Oberflächenspannung; November 2004
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- ring method
- Specific details on test material used for the study:
- SOURCE OF TEST MATERIAL
- Expiration date of the lot/batch: 01-Jul-2022
STABILITY AND STORAGE CONDITIONS OF TEST MATERIAL
- Storage condition of test material: at 20°C +/- 5°C, in the dark - Key result
- Surface tension:
- 64.2 mN/m
- Temp.:
- 20 °C
- Conc.:
- 1 g/L
- Conclusions:
- The surface tension of the aqueous solution of the test item (1 g/L) changed after the start of the measurement for 45 min; after 45 min the values were constant. The mean value of all measured surface tension was calculated to be: 64.2 mN/m at 20 °C ± 0.5 °C.
- Executive summary:
The surface tension of the test item was determined using a tensiometer. Surface Tension of Water: 72.8 mN/m at 20 °C ± 0.5 °C. The surface tension of the aqueous solution of the test item (1 g/L) changed after the start of the measurement for 45 min; after 45 min the values were constant. The mean value of all measured surface tension was calculated to be: 64.2 mN/m at 20 °C ± 0.5 °C.
Reference
Surface Tension of Water: 72.8 mN/m at 20 °C ± 0.5 °C
The test item which lowers the surface tension of the medium in which it is dissolved, and/or the interfacial tension with other phases, and, accordingly, is positively adsorbed at the liquid/vapour and/or at other interfaces - is a surface active test item.
Description of key information
The surface tension of Reactive Red 24 was determined to be 64.2 mN/m at 20°C.
Key value for chemical safety assessment
- Surface tension:
- 64.2
- in mN/m at 20°C and concentration in mg/L:
- 1 000
Additional information
The surface tension of the test item was determined using a tensiometer. Surface Tension of Water: 72.8 mN/m at 20 °C ± 0.5 °C. The surface tension of the aqueous solution of the test item (1 g/L) changed after the start of the measurement for 45 min; after 45 min the values were constant. The mean value of all measured surface tension was calculated to be: 64.2 mN/m at 20 °C ± 0.5 °C.
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