2,2-Difluoroethyl 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:

From 08 July 2014 to 22 October 2014

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:

1995

GLP compliance:

yes (incl. QA statement)

Type of method:

OECD harmonised ring method

Key result

Surface tension:

70.5 mN/m

Temp.:

20 °C

Conc.:

1 g/L

Determination of the Surface Tension of 2,2-Difluoroethyl acetate:

Time (minutes)	Surface tension (mN/m)
	Measured		Calibration corrected*
	A	B	A	B
0	71.5	72.0	71.2	71.7
5	71.5	72.0	71.2	71.7
10	72.0	71.5	71.7	71.2
15	72.0	72.0	71.7	71.7
20	72.0	72.0	71.7	71.7
25	71.5	72.0	71.2	71.7
30	72.0	72.0	71.7	71.7

* Instrument readings were multiplied by the calibration factor that was calculated as follows: Ø_b = σ_o / σ_g, where:

σ_o = Literature value for the surface tension of water at 20 °C (72.7 mN/m).

σ_g = Measured surface tension of water at 20 °C (73.0 mN/m).

Therefore, the calibration factor, Ø_b = 0.996

 

Overall mean calibration corrected surface tension = 71.5 mN/m.

 

Harkins-Jordan corrected value = 70.5 mN/m (HARKINS, W.D. and JORDAN, H.F., J. Amer. Chem. Soc. 52, 1751 (1930)).

Conclusions:

The surface tension of a 1 g/L aqueous solution of 2,2-Difluoroethyl acetate was found to be 70.5 mN/m. As the result was greater than 60 mN/m, the test substance is not considered to be surface active.

Executive summary:

The surface tension of a 1 g/L aqueous solution of 2,2-Difluoroethyl acetate was investigated in a GLP-compliant study according to OECD test guideline 115 using OECD harmonised ring method. The surface tension was determined to be equal to 70.5 mN/m. As the result was greater than 60 mN/m, the test substance is not considered to be surface active.

Description of key information

The surface tension of a 1 g/L aqueous solution of 2,2-Difluoroethyl acetate is equal to 70.5 mN/m. As the result is greater than 60 mN/m, 2,2-Difluoroethyl acetate is not considered to be surface active.

Key value for chemical safety assessment

Surface tension:

70.5

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

1 000

Additional information

An experimental study performed under GLP compliance and in accordance with OECD test guideline 115 was flagged as a key study and assigned a Klimisch score of 1. It reports that the surface tension of a 1 g/L aqueous solution of 2,2-Difluoroethyl acetate is equal to 70.5 mN/m. As the result was greater than 60 mN/m, 2,2-Difluoroethyl acetate was is not considered to be surface active.