Registration Dossier
Registration Dossier
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EC number: 827-581-0 | CAS number: -
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:
- 2018
- 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)
- Principles of method if other than guideline:
- The measuring system consists of; a platinum duNoüy ring attached to a tensiometer, and a measurement vessel to hold the test solution. The ring is suspended horizontally to the surface plane to avoid erroneous readings from the measuring system.
HPLC grade water is used to prepare the test solution of known concentration. The concentration of the test solution prepared depends on the aqueous solubility of the test material. If the aqueous solubility of the test material is greater than 1 gL-1, a test solution of concentration 1 gL-1 is prepared. If the aqueous solubility is greater than or equal to 1 mgL-1, but less than 1 gL-1, a 90% saturated test solution is prepared. However if the water solubility is less than 1 mgL-1 no testing is required. The solutions are maintained at the test temperature (20 ±0.5°C).
The surface tension of the water used to prepare the test solution is initially determined to ensure suitability for testing.
The test solution is transferred into the measurement vessel, taking care to avoid foaming and placed on an adjustable table attached to the tensiometer. The table is raised until the ring is immersed below the surface of the solution. The table is then lowered gradually and evenly until the ring is detached from the surface (i.e. the maximum force is reached). The tensiometer unit provides a reading corrected for both weight calibration and ring measurements (Zuidema & Waters). This is recorded as the surface tension of the test solution. - GLP compliance:
- yes
- Type of method:
- ring method
- Key result
- Surface tension:
- 29.7 mN/m
- Temp.:
- 20 °C
- Conc.:
- 1 g/L
- Conclusions:
- The surface tension of the substance was determined to be 29.7 mN.m-1 (mean value from two runs)
- Executive summary:
The surface tension of the test item was determined in a GLP study conducted in accordance with OECD Guideline 115 (Surface Tension of Aqueous Solutions)
The surface tension was determined to be 29.7 mN.m-1 (mean value from two runs)
Reference
Description of key information
Key value for chemical safety assessment
- Surface tension:
- 29.7
Additional information
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