Registration Dossier
Registration Dossier
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EC number: 920-164-5 | CAS number: 34160-06-0
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:
- 03 May 2018 - 05 June 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)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.5 (Surface Tension)
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- OECD harmonised ring method
- Specific details on test material used for the study:
- - Batch: D05/38
- Expiration date: 30 August 2021
- Purity: 97.36%
- Storage condition of test material: Room temperature in the dark - Key result
- Surface tension:
- 48.5 mN/m
- Temp.:
- 20 °C
- Conc.:
- 90 other: % saturated solution in water
- Conclusions:
- A 90% saturated solution of potassium 12-hydroxystearate in water has a surface tension of 48.5 mN/m at 20°C.
- Executive summary:
The surface tension of potassium 12 -hydroxystearate was determined in a GLP-compliant study following OECD guideline 115. A 90% saturated solution of potassium 12-hydroxystearate in water has a surface tension of 48.5 mN/m at 20°C. As the surface tension of the substance is less than 60 mN/m, potassium 12 -hydroxystearate is considered to be surface active.
Reference
Results
Test temperature: |
20°C |
Sample concentration: |
90% saturated solution in water |
Sample age: |
Tested immediately after preparation |
Initial values for the surface tension were obtained as soon as possible after transfer of the aqueous solution to the measurement vessel.
Time |
Surface tension (mN/m) |
|||
Measured |
Calibration corrected |
|||
A |
B |
A |
B |
|
|
|
|
|
|
0 |
49.0 |
49.5 |
49.5 |
50.0 |
5 |
50.5 |
51.0 |
51.0 |
51.5 |
10 |
50.5 |
50.5 |
51.0 |
51.0 |
15 |
51.0 |
50.5 |
51.5 |
51.0 |
20 |
51.0 |
50.0 |
51.5 |
50.5 |
25 |
50.5 |
50.5 |
51.0 |
51.0 |
30 |
51.0 |
50.5 |
51.5 |
51.0 |
|
|
|
|
|
Mean calibration corrected surface tension = 51.0 mN/m
Harkins-Jordan corrected value = 48.5 mN/m
Description of key information
A 90% saturated solution of potassium 12-hydroxystearate in water has a surface tension of 48.5 mN/m at 20°C.
Key value for chemical safety assessment
- Surface tension:
- 48.5
- in mN/m at 20°C and concentration in mg/L:
- 900
Additional information
The surface tension of potassium 12 -hydroxystearate was determined in a GLP-compliant study following OECD guideline 115 (Agrochemex 2018). A 90% saturated solution of potassium 12-hydroxystearate in water (assumed to be 900 mg/L based on a water solubility value of 1000 mg/L) has a surface tension of 48.5 mN/m at 20°C. As the surface tension of the substance is less than 60 mN/m, potassium 12 -hydroxystearate is considered to be surface active.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
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