Butanedioic acid, 2-sulfo-, mono(C16-18 and C18-unsatd. alkyl) esters, ammonium sodium salts

Surface tension

Link to relevant study record(s)

Reference

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

Remarks:

guideline compliant well documented non-GLP study.

Qualifier:

according to guideline

Guideline:

EU Method A.5 (Surface Tension)

Deviations:

no

GLP compliance:

no

Type of method:

ring method

Key result

Surface tension:

28.2 mN/m

Temp.:

20 °C

Conc.:

1 g/L

Water calibration:   Temp. = 24 °C, σ = 0.997 g/cm³

 

Surface tension of purified water
Value 1	71.6 mN/m
Value 2	71.6 mN/m
Value 3	71.6 mN/m
Value 4	71.6 mN/m
Value 5	71.5 mN/m
Value 6	71.5 mN/m
Arithmetic mean	71.6 mN/m
Standard deviation	0.0 mN/m

 

Arithmetic mean 71.6 mN/m, standard deviation 0.0 mN/m

(Theoretical value: 72.0 mN/m ->correction factor 1.0056)

 

 

Test item, first measurement:     

 

(c = 1048 mg/l), Temp. = 24 °C, σ = 0.997 g/cm³, age of solution = 92 min)

 

Surface tension of solution 1
Value 1	29.4 mN/m
Value 2	28.6 mN/m
Value 3	28.2 mN/m
Value 4	27.7 mN/m
Value 5	27.5 mN/m
Value 6	27.3 mN/m
Arithmetic mean	27.9 mN/m
Standard deviation	0.5 mN/m

 

Arithmetic mean 27.9 mN/m, standard deviation 0.5 mN/m

 

 

Test item, second measurement:          

 

(c = 1008 mg/l), Temp. = 24 °C, σ = 0.997 g/cm³, age of solution = 98 min)

                                  

Surface tension of solution 2
Value 1	30.3 mN/m
Value 2	29.2 mN/m
Value 3	28.4 mN/m
Value 4	27.9 mN/m
Value 5	27.6 mN/m
Value 6	27.4 mN/m
Arithmetic mean	28.1 mN/m
Standard deviation	0.7 mN/m

 

                                     

Arithmetic mean 28.1 mN/m, standard deviation 0.7 mN/m

 

By adjusting the temperature setting of the tensiometer, differences in the density of the liquid can be compensated automatically.

 

 

Arithmetic mean of two test solutions:              28.0 mN/m (± 0.1 mN/m)

 

Arithmetic mean corrected by calibration

factor determined via water calibration:            28.2 mN/m

 

The sample was dissolved in water and tempered at 20 °C. Then the automatic measurement was initiated. The measurement was completed after 250 seconds.

 

For the determination concentrations of 1 g/l were dissolved after conditioning for 10 min in an ultrasonic bath and stirring for 1 h with a magnetic stirrer.

 

The test item has a surface tension of

 

28.2 mN/m

 

(concentration = 1 g/l) in accordance with the test method A.5. "Surface Tension" as described in the Commission Regulation (EC) No 440/2008 of 30 May 2008 laying down test methods pursuant Regulation (EC) No 1907/2006 of the European Parliament and of the Council on the Registration, Evaluation, Authorisation and Restriction of Chemicals (REACH), also similar to OECD guideline for testing of chemicals OECD 115.

Conclusions:

Surface tension: 28.2 mN/m

Executive summary:

In the non-GLP Klimisch 1 study from Kintrup (2012) the surface tension of Butanedioic acid, sulfo-, mono (C16-18 and C18-unsatd. alkyl) esters, ammonium sodium salt was determined according to test method EEC A.5 with the ring method at 20 °C and a concentration of 1 g/L to be 28.2 mN/m.

The result is considered acceptable for the risk assessment.

Key value for chemical safety assessment

Surface tension:

28.2

in mN/m at 20°C and concentration in mg/L:

1 000

Additional information

In the non-GLP Klimisch 1 study from Kintrup (2012) the surface tension of Butanedioic acid, sulfo-, mono (C16-18 and C18-unsatd. alkyl) esters, ammonium sodium salt was determined according to test method EEC A.5 with the ring method at 20 °C and a concentration of 1 g/L to be 28.2 mN/m.

The result is considered acceptable for the risk assessment.