Benzeneacetyl chloride, 2,5-dimethyl-

Surface tension

Link to relevant study record(s)

Reference

Endpoint:

surface tension

Type of information:

experimental study

Adequacy of study:

key study

Study period:

18 Oct 2006

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

GLP compliance:

yes (incl. QA statement)

Type of method:

OECD harmonised ring method

Key result

Surface tension:

62.48 mN/m

Temp.:

20 °C

Conc.:

1 g/L

Remarks on result:

other: Concentration see 'Any other information on results'

Two aqueous solutions of the test item in distilled water (203.1 mg and 206.7 mg ad 200 ml) were prepared by using the ultrasonic bath for 10 minutes and stirring 2 h and 4 h at room temperature. The saturated solutions were filtered through 0.2 μm membrane filters and then diluted to 90% of the saturation concentration (90 ml solution ad 100 ml distilled water).

 

The measurement was carried out at 20°C ± 0.5°C. A correction factor (Harkins & Jordan) has been accounted.

Mean (experiments 1 to 2): σmean= 61.57 mN/m

Standard deviation: 0.08 mN/m

Relative standard deviation: 0.13 %

The mean value, multiplied by the calibration factor (F= 1.0149) yields to: σ = σmean· F = 62.48 mN/m

 

Validity criteria for the measurement of the surface tension:

Target condition according to guideline OECD 115:	Actual condition according to the study:	Validity criteria met:
A solution of the substance is prepared in distilled water. The concentration of this solution should be 90 % of the saturation solubility of the substance in water; when this concentration exceeds 1 g/ L, a concentration of 1 g/ L is used for testing.	The saturated solutions were diluted to 90% of the saturation concentration (90 ml solution ad 100 ml distilled water).	Yes
The measurement shall be made at approximately 20°C and shall be controlled to within ± 0.5 °C.	The measurement was carried out at 20 °C ± 0.5°C.	Yes
The measurement results: individual readings, their arithmetic mean and the corrected mean; concentration of the solution should be stated.	It was stated that the concentration was 90 % of the saturation concentration. The rest of the results are stated in sufficient detail (the correction facter has been accounted in the measured values stated). The mean with and without calibration factor F was stated.	Yes (with restrictions regarding the not stated concentration of the test substance).

 

Conclusions:

The surface tension of the substances was determined using the OCED harmonized ring method. Applying a correction factor (Harkings & Jordan) to the mean value of 10 measurements, a surface tension of 62.48 mN/m was determined.

Executive summary:

The surface tension was determined according to the guideline 92/69/ EEC method A.5. and OECD guideline 115.

 

According to the EEC guideline a saturated solution has been prepared and then diluted to 90 % of the saturation concentration.

The surface tension was: σ = 62.5 mN/m at 20°C °C.

Description of key information

The surface tension of the substances was determined using the OCED harmonized ring method. Applying a correction factor (Harkings & Jordan) to the mean value of 10 measurements, a surface tension of 62.48 mN/m was determined.

Key value for chemical safety assessment

Surface tension:

62.48

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

1 000