3,5,5-trimethylhexanoic acid

Surface tension

Link to relevant study record(s)

Reference

Endpoint:

surface tension

Type of information:

experimental study

Adequacy of study:

key study

Study period:

Study initiation date: 29 July 2009 Study completion date: 19 November 2009

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)

Version / remarks:

adopted on 27 July 1995

Deviations:

no

Qualifier:

according to guideline

Guideline:

EU Method A.5 (Surface Tension)

Version / remarks:

Official Journal L 383 A 1992

Deviations:

no

GLP compliance:

yes

Type of method:

ring method

Key result

Surface tension:

35.3 mN/m

Temp.:

20 °C

Conc.:

0.63 g/L

Details on measurement results are given in the following table:

	First run	Second run
Number of measurements	10	10
Total measuring time [min:s]	5:58	5:57
Measuring time of the last 10 measurements [min:s]	5:58	5:57
Measurement 1	35.24	35.41
Measurement 2	35.23	35.40
Measurement 3	35.22	35.40
Measurement 4	35.22	35.41
Measurement 5	35.22	35.41
Measurement 6	35.22	35.41
Measurement 7	35.23	35.41
Measurement 8	35.23	35.41
Measurement 9	35.22	35.42
Measurement 10	35.23	35.42
Mean value [mN/m]^1)	35.23	35.41
Surface tension [mN/m]^2)	35.2	35.4
Mean value [mN/m]	35.3

1) Mean value of the last ten measurements

2) corrected mean value (measured value x apparatus factor = corrected value)

Conclusions:

Surface tension (OECD 115) : 35.3 mN/m (at 20°C)
The test item is considered to be surface active.

Executive summary:

The surface tension of aqueous solutions of the test item was determined compliant with GLP according to OECD guideline no. 115 [adopted on 27 July 1995] and EU test method A.5 [Directive 92/69/EEC, Official

Journal L 383 A 1992] with the ring method.

The reliable study produced the following results:

Surface tension (at 20°C): 35.3 mN/m

The test item is considered to be surface active.

Description of key information

Surface tension (OECD 115): 35.3 mN/m at 20°C (630 mg/L)

Key value for chemical safety assessment

Surface tension:

35.3

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

630

Additional information

The surface tension of aqueous solutions of the test item was determined compliant with GLP according to OECD guideline no. 115 [adopted on 27 July 1995] and EU test method A.5 [Directive 92/69/EEC, Official

Journal L 383 A 1992] with the ring method. The reliable study produced the following results:

Surface tension (at 20°C): 35.3 mN/m (630 mg/L).

The test item is considered to be surface active.