1,3-dimethyl-3-phenylbutyl acetate

Surface tension

Link to relevant study record(s)

Reference

Endpoint:

surface tension

Type of information:

experimental study

Adequacy of study:

key study

Study period:

16 February 2015 to 17 February 2015

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)

Deviations:

no

Qualifier:

according to guideline

Guideline:

EU Method A.5 (Surface Tension)

Deviations:

no

GLP compliance:

no

Type of method:

OECD harmonised ring method

Surface tension:

50.69 mN/m

Temp.:

20 °C

Conc.:

76.1 mg/L

Remarks on result:

other: Surface tension 50.69 mN/m (standard deviation ± 0.04 mN/m). Concentration is 90 % of the saturated aqueous solution concentration.

Due to the fact that the surface tension is < 60 mN/m, the test item is classified as a surface-active substance.

Based on the measured water solubility value of 84.5 mg/L at 20 °C, the concentation of a 90 % saturated aqueous solution of the test item is 76.1 mg/L.

Surface Tension of a 90 % Saturated Aqueous Solution of Test Item

Measurement No.*	Time (min)**	Surface Tension (mN/m)***	Temperature (ºC)
1	38.0	50.79	20.1
2	38.7	50.71	20.1
3	39.4	50.72	20.1
4	40.1	50.69	20.1
5	40.8	50.64	20.1
6	41.5	50.65	20.1
7	42.2	50.68	20.1
8	42.9	50.66	20.2
9	43.6	50.68	20.1
10	44.4	50.70	20.1
Mean	-	50.69	20.1
Standard Deviation (±)	-	0.04	0.03

* The last 10 measurements

**Time from transfer of test solution into test vessel until end of each measurement

*** Values already corrected acc. to HARKINS & JORDAN

The density of the 90 % saturated aqueous solution of the test item in double distilled water was determined in a preliminary measurement to be 1.000 g/cm3 (20.2 °C).

The surface tension of the reference item n-heptane was determined on 2014-08-19 as 20.07 ± 0.01 mN/m (20 °C) and is within the acceptable range of 20.23 ± 0.22 mN/m.

Validity Criteria: The temperature of the test solution had to be 20 ± 0.5 °C.

Conclusions:

The surface tension of a 90 % saturated aqueous solution (76.1 mg/L) of 1,3-dimethyl-3-phenylbutyl acetate was determined to be 50.69 mN/m (standard deviation ± 0.04) at 20 ºC. As the surface tension is < 60 mN/m, the test item is classified as a surface-active substance.

Executive summary:

The surface tension of a 90 % saturated aqueous solution (76.1 mg/L) of 1,3 -dimethyl-3-phenylbutyl acetate was determined to be 50.69 mN/m (standard deviation ± 0.04) at 20 ºC. As the surface tension is < 60 mN/m, the test item is classified as a surface-active substance. The surface tension was determined using the harmonised ring method according to OECD guideline 115 (2015). The study is considered reliable and relevant for use for this endpoint.

Description of key information

The surface tension of a 90 % saturated aqueous solution (76.1 mg/L) of 1,3-dimethyl-3-phenylbutyl acetate was determined to be 50.69 mN/m (standard deviation ± 0.04) at 20 ºC. As the surface tension is < 60 mN/m, the test item is classified as a surface-active substance. 

Key value for chemical safety assessment

Surface tension:

50.69

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

76.1

Additional information

The surface tension was determined using the harmonised ring method according to OECD guideline 115 (2015). The study is considered reliable and relevant for use for this endpoint.