reaction product of aminoacids and palmitoyl chloride

Surface tension

Administrative data

Endpoint:

surface tension

Type of information:

experimental study

Adequacy of study:

key study

Study period:

03/14/11-03/16/11

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2011

Report date:

2011

Materials and methods

Test guideline

Test guideline 1

Qualifier:

according to guideline

Guideline:

OECD Guideline 115 (Surface Tension of Aqueous Solutions)

Deviations:

no

Test guideline 2

Qualifier:

according to guideline

Guideline:

EU Method A.5 (Surface Tension)

Deviations:

no

Principles of method if other than guideline:

Measurement of the maximum force, applied vertically, required to separate a ring from its contact with the surface of the test liquid.
The readings noted on the apparatus are corrected by multiplication by the calibration factor of the apparatus. The maximum approximate accuracy of the force measurement is ± 10-6 N.
The measurements are performed in a thermo-regulated room at about 20 °C.

GLP compliance:

yes (incl. QA statement)

Type of method:

ring method

Test material

Test material information

Constituent 1

Details on test material:

Identification SEPIFEEL ONE
Identification of the flask LCE08115; 500 g
Batch 0826900020
CAS number Not provided
Expiry date September 25, 2011
Supplier SEPPIC
Appearance White solid
Packaging 2 Grey plastic cans with white stoppers
Quantity received 2 x 500 g
Date of the reception November 18, 2008
Storage In darkness at room temperature
Identification number for the study 08-138

Specific details on test material used for the study:

TEST ITEM
Identification LCE08115
Identification of the flask LCE08115; 500 g Batch 0826900020
Expiry date 25 September 2011
Supplier SEPPIC
Appearance White solid
Packaging 2 Grey plastic cans with white stoppers
Quantity received 2 x 500 g
Date of the reception 18 November 2008
Storage In darkness at room temperature
Identification number for the study 08-138

REFERENCE ITEM

REFERENCE ITEMS
Identification Dodecylbenzene sulfonic acid, sodium salt
Last validation of the test 02 November 2010
Periodicity of validation (in months) 12
Results 34.4 ± 0.2 mN/m
Theoretical value 33.0 ± 1.7 mN/m
Conformity Yes

Identification Pure isopropanol
Last validation of the test 28 October 2010
Periodicity of validation (in months) 12
Results 20.8 ± 0.1 mN/m
Theoretical value 21.7 ± 1.1 mN/m
Conformity Yes

Results and discussion

Surface tension

Key result

Surface tension:

>= 35.7 - <= 36.3 mN/m

Temp.:

20 °C

Conc.:

0.193 g/L

Applicant's summary and conclusion

Conclusions:

The mean surface tension of the test item at 0.1926 g/L in demineralized water was 36.0 ± 0.3 mN/m (corrected value).
The test item was considered to be surface-active under our experimental conditions.

Executive 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)

The mean surface tension of the test item at 0.1926 g/L in demineralized water was 36.0 ± 0.3 mN/m (corrected value).

The test item was considered to be surface-active under our experimental conditions.