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Diss Factsheets

Physical & Chemical properties

Surface tension

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Reference
Endpoint:
surface tension
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: GLP study, OECD guideline
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)
Remarks:
Ministere de l'Economie, des Finances et de l'Emploi, Paris, France
Type of method:
ring method
Specific details on test material used for the study:
TEST ITEM:
Identification PROTEOL OAT
Identification of the flask LCE08118; 500 g
Batch number 0820000006
Expiry date Not provided
Supplier SEPPIC
Appearance Clear yellow limpid viscous liquid
Packaging 1 White plastic flask with blue stopper
Quantity received 1 x 500 g
Date of the reception November 18, 2008
Storage In darkness at room temperature
Expiry date: 18.July 2011

REFERENCE ITEM:
Identification: Dodecylbenzene sulfonic acid, sodium salt
Last validation of the test: 15 october 2009
Periodicity of validation (in months): 12
Results: 34.7 +/- 0.1 mN/m
Conformity: Yes
Surface tension:
29.8 mN/m
Temp.:
20.3 °C
Conc.:
1 g/L
Remarks on result:
other: The test item was considered as surface-active in our experimental conditions.

Details results: Calculation

 Assay Measurements (mN/m)   

Average corrected value using φb (mN/m)

   

Average corrected value  

according to Harkins & Jordan table (mN/m)

          state of equilibrium

1

 34.2

 31.7

 29.8

2 

 34.9

  

31.7

 29.8

3

 34.2

  

31.7

29.8 

 Mean

 34.4

  

31.7

 29.8

The test item was considered as surface-active in our experimental conditions.

Conclusions:
The mean surface tension of the test item at 1 g/L in demineralized water was: 29.8 ± 0.5 mN/m (corrected value). The test item was considered as surface-active in our experimental conditions.
Executive summary:

In compliance with Commission Directive 92/69/EEC, Commission Regulation (EC) No. 440/2008 EC A5 method (2008) and OECD Guideline No. 115 (1995)

CONCLUSION

The mean surface tension of the test item at 1 g/L in demineralized water was: 29.8 ± 0.5 mN/m (corrected value). The test item was considered as surface-active in our experimental conditions.

Description of key information

Test material: the liquid marketed product "Proteol OAT" which contains ca.27.5% of the solid substance "Glutens, hydrozylates, reaction products with lauroyl chloride, sodium salts".

Method: OECD 115- ring method

The mean surface tension of the test item at 1 g/L in demineralized water was: 29.8 ± 0.5 mN/m (corrected value)

Key value for chemical safety assessment

Surface tension:
29.8
in mN/m at 20°C and concentration in mg/L:
1 000

Additional information

In compliance with Commission Directive 92/69/EEC, Commission Regulation (EC) No. 440/2008 EC A5 method (2008) and OECD Guideline No. 115 (1995), the mean surface tension of the test item at 1 g/L in demineralized water was: 29.8 ± 0.5 mN/m (corrected value). The test item was considered as surface-active in our experimental conditions.