Betaines, coco alkyldimethyl(3-sulfopropyl)

Surface tension

Administrative data

Endpoint:

surface tension

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2017-07-14 (experimental phase)

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2018

Report date:

2018

Materials and methods

Test guideline

Test guideline 1

Qualifier:

according to guideline

Guideline:

OECD Guideline 115 (Surface Tension of Aqueous Solutions)

Version / remarks:

OECD Guideline 115 dated 27 July 1995 “Surface tension of aqueous solutions“

Deviations:

no

Test guideline 2

Qualifier:

according to guideline

Guideline:

EU Method A.5 (Surface Tension)

Version / remarks:

EU-Method A.5 “Surface Tension“, Regulation (EC) N°440/2008 of 30. May 2017, published on 31 May 2008 (as updated)

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Type of method:

plate method

Test material

Test material information

Constituent 1

Reference substance name:

Betaines, coco alkyldimethyl(3-sulfopropyl)

EC Number:

269-225-1

EC Name:

Betaines, coco alkyldimethyl(3-sulfopropyl)

Cas Number:

68201-55-8

Molecular formula:

C7H17NO3S·[CH2]6-16

IUPAC Name:

[3-(dodecyldimethylazaniumyl)propyl]trioxo-λ⁶-sulfanuide

Test material form:

solid: particulate/powder

Remarks:

white

Specific details on test material used for the study:

SOURCE OF TEST MATERIAL
- Source and lot/batch No.of test material: sponsor

STABILITY AND STORAGE CONDITIONS OF TEST MATERIAL
- Storage condition of test material: The test item was stored in a closed vessel at room temperature (17.8 – 22.5°C)

Results and discussion

Surface tension

Key result

Surface tension:

>= 35.23 - <= 35.64 mN/m

Temp.:

20 °C

Conc.:

1 g/L

Applicant's summary and conclusion

Conclusions:

The surface tension was determined in a GLP guideline study according to OECD 115 and EU method A.5 without deviations on the registered substance itself. Hence, there is no indication given that the results are not reliable. Values ranging from 35.23 mN/m to 35.64 mN/m were recorded showing no significant variations. As the determined surface tension of Sulfobetaines, coco alkyldimethyl(3-sulfopropyl) was lower than 60 mN/m, the test item can be classified as surface active.

Executive summary:

The surface tension of the test item was determined by means of a plate tensiometer according to OECD 115 and EU method A.5 (GLP). The surface tension of an aqueous solution of Sulfobetaines, coco alkyldimethyl(3-sulfopropyl) was determined as 35.45 ± 0.07 mN/m at 20.4 °C. One measurement was performed for verification (after 61 minutes). No significant changes and thus no significant dependence on time was observed. As these values were lower than 60 mN/m, Sulfobetaines, coco alkyldimethyl(3-sulfopropyl) was classified as surface active. The surface tension of the negative control lay within the accepted range.