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Physical & Chemical properties

Surface tension

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Endpoint:
surface tension
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
OECD Guideline 115 (Surface Tension of Aqueous Solutions)
Version / remarks:
27-07-1995
Deviations:
no
GLP compliance:
no
Other quality assurance:
ISO/IEC 17025 (General requirements for the competence of testing and calibration laboratories)
Remarks:
Certificate No. 3287.01
Type of method:
plate method
Specific details on test material used for the study:
Chemical Name Cetyl Betaine
CAS# 693-33-4
EC# 211-748-4
Physical State liquid
Sample ID 53841K16
Manufacturer DeForest
Received on November 22, 2016
Tested on February 2, 2017
Key result
Surface tension:
31.47 mN/m
Temp.:
20 °C
Conc.:
0.1 other: wt%

Standard deviation was 31.47 ± 0.19

Endpoint:
surface tension
Type of information:
experimental study
Adequacy of study:
supporting study
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
comparable to guideline study
Qualifier:
equivalent or similar to
Guideline:
OECD Guideline 115 (Surface Tension of Aqueous Solutions)
Deviations:
not specified
GLP compliance:
no
Type of method:
other: Equipment: Fisher Surface Tensiometer, Model 20, from Fisher Scientific
Specific details on test material used for the study:
Cola®Teric CDB, lot # 56587D17 (cetyl betaine 30% in aqueous solution), was tested for surface tension at various dilutions, using deionized water to make up the solutions.
Cola®Teric CDB consists of approximately 30% by weight of Cetyl Betaine, CAS # 693-33-4. The remainder of the material is water, 64% and associated salt, 6%.
Key result
Surface tension:
ca. 36.7 mN/m
Temp.:
23 °C
Conc.:
0.105 other: wt%

Table 1 – Surface Tension measurements for Cola®Teric CDB, lot 56587D17

           %Active         Surface Tension                    Average         Time Delay

           0.00107          37.8    37.3    37.5                37.5                30

           0.0112            35.9    36.1    36.3                36.1                30

           0.105              36.4    36.5    36.7                36.5                30

           1.063              36.7    36.7    36.8                36.7                30

 

Description of key information

Cetyl betaine was tested as a 0.1wt% solution in distilled water. Surface tension determinations were performed upon a clear solution.

The surface tension was reported as 31.47 ± 0.19 mN/m at 20 °C.

A supporting study carried out at Colonial gave a Surface tension measurement of 36.5 mN/m at 23°C

Key value for chemical safety assessment

Surface tension:
31.47
in mN/m at 20°C and concentration in mg/L:
1 000

Additional information