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EC number: 224-079-8 | CAS number: 4196-86-5
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:
- 27.07.2018 - 02.08.2018
- 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:
- plate method
- Specific details on test material used for the study:
- Name: Pentaerythritol tetrabenzoate
Appearance: off-white solid
Composition: Pentaerythritol tetrabenzoate >96%
CAS No.: 4196-86-5
EINECS-No.: 224-079-8
Molecular formula: C33H28O8
Molecular weight: 552.576 g/mol
Purity: >96%
Homogeneity: homogeneous
Expiry date: Nov. 2018
Storage: Room Temperature (20 ± 5°C) - Key result
- Surface tension:
- ca. 67.62 mN/m
- Temp.:
- 19.9 °C
- Conc.:
- 1.4 mg/L
- Remarks on result:
- other: not surface active
- Conclusions:
- The surface tension of an aqueous solution of Pentaerythritol tetrabenzoate was determined as 67.62 ± 0.16 mN/m at 19.9 °C. As these values were higher than 60 mN/m, Pentaerythritol tetrabenzoate is classified as not surface active.
- Executive summary:
The surface tension of an aqueous solution of Pentaerythritol tetrabenzoate was determined following OECD testing guideline resp. EU A.5 and concluded to be 67.62 ± 0.16 mN/m at 19.9 °C. One additional measurement series was performed for verification (after 61 minutes). No significant changes and thus no significant dependence on time were observed. As these values were higher than 60 mN/m, Pentaerythritol tetrabenzoate is classified as not surface active.
The surface tension of the negative control lay within the accepted range. The concentration of the test item in the 90% saturated test solution was determined as 1.40 mg test item/L (based on analy sis of dissolved organic carbon in the test solution). The saturated solution was obtained from an aqueous solution prepared by shaking 1.00 g/L in water HPLC grade shaking for 96 hours at 20.9 - 23.8 °C in a closed flask at 150 rpm.
Reference
During the specified period of time, no significant changes in the surface tension were detected. Values ranging from 67.50 mN/m to 68.57 mN/m were recorded showing no significant variations. The values of the single determinations show no significant difference (less than 5 % (0.77%) between mean values of the two measurement series) As the determined surface tension of Pentaerythritol tetrabenzoate was higher than 60 mN/m, the test item can be classified as not surface active.
The values of the single determinations showed no significant difference (0.77% between mean values of the two measurement series). All measured values lay above the threshold for surface tension which is stated in the guidelines. The surface tension of the negative control was determined with a difference of 0.11% from the stated literature value. Therefore, the result of the test is considered valid and the test item Pentaerythritol tetrabenzoate is classified as “not surface active” in a concentration of 1.40 mg/L (in a solution at 90% saturation obtained from an aqueous solution prepared with 1.00 g/L in water HPLC grade shaking for 96 hours at 20.9 - 23.8 °C in a closed flask at 150 rpm.).
Description of key information
The surface tension of an aqueous solution of Pentaerythritol tetrabenzoate was determined following OECD testing guideline resp. EU A.5 and concluded to be 67.62 ± 0.16 mN/m at 19.9 °C. One additional measurement series was performed for verification (after 61 minutes). No significant changes and thus no significant dependence on time were observed. As these values were higher than 60 mN/m, Pentaerythritol tetrabenzoate is classified as not surface active.
The surface tension of the negative control lay within the accepted range. The concentration of the test item in the 90% saturated test solution was determined as 1.40 mg test item/L (based on analy sis of dissolved organic carbon in the test solution). The saturated solution was obtained from an aqueous solution prepared by shaking 1.00 g/L in water HPLC grade shaking for 96 hours at 20.9 - 23.8 °C in a closed flask at 150 rpm.
Key value for chemical safety assessment
- Surface tension:
- 67.62
- in mN/m at 20°C and concentration in mg/L:
- 1.4
Additional information
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