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Surface tension

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Reference
Endpoint:
surface tension
Type of information:
experimental study
Adequacy of study:
key study
Study period:
25/11/2008-28/06/2010
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:
ring method
Specific details on test material used for the study:
TEST ITEM
Identification LCA08041
Identification of the flask LCA08041; Batch: 0814400021; Manufacturing date: 23/05/2008
Batch 0814400021
Expiry date 23 May 2011
Supplier GIVAUDAN-LAVIROTTE
Appearance Beige opaque liquid
Packaging 2 Opaque plastic flasks
Quantity received 2 x 250 mL
Date of the reception 18 November 2008
Storage In darkness at room temperature
Identification number of the test item 08-137
The test item will be stored in our test facility for at least two months after sending the final report of all DEFITRACES studies concerning this test item, then it will be destroyed by DEFITRACES.

REFERENCE ITEM
Identification: Dodecylbenzene sulfonic acid, sodiumm salt
Last validation of the test: 15 October 2009
Periodicity of validation (in months): 12
Results: 34.7 +/- 0.1 mN/m
Conformity Yes
Key result
Surface tension:
>= 32.1 - <= 33.1 mN/m
Temp.:
20.2 °C
Conc.:
1 g/L

 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

 37.2

 34.5

 32.6

 37.1

  

34.5

 32.6

3

 37.9

  

34.5

32.6

 Mean

 37.4

  

34.5

 32.6

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: 32.6 ± 0.5 mN/m (corrected value).
The test item was considered as surface-active in our experimental conditions.
Executive summary:

SUMMARY

SURFACE TENSION

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: 32.6 ± 0.5 mN/m (corrected value).

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

Description of key information

The mean surface tension of the test item at 1 g/L in demineralized water was: 32.6 ± 0.5 mN/m (corrected value).

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

Key value for chemical safety assessment

Surface tension:
32.6
in mN/m at 20°C and concentration in mg/L:
1 000

Additional information

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