Reaction mass of propylidynetrimethanol and 2-ethylpropane-1,3-diol and 5-ethyl-1,3-dioxane-5-methanol

Surface tension

Link to relevant study record(s)

Reference

Endpoint:

surface tension

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2006-10-10

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other: The pendant drop method has been compared to the ring method OECD 115 and gave good correlation. (Company report no W09-2478). Accepted well-documented technique which meets scientific principles

Qualifier:

equivalent or similar to guideline

Guideline:

OECD Guideline 115 (Surface Tension of Aqueous Solutions)

Deviations:

no

Remarks:

Pendant drop method, correlates well to OECD115, Pendant drop method, Perstorp A1577, study that compares the methods is Company report W09-2478.

Principles of method if other than guideline:

A syringe was filled with approximately 10 ml of the solution and was attached to the instrument. The solution was mechanically expelled from the syringe so that it formed a drop on the tip of the needle. This drop was examined optically by the software and 20 images were collected at a rate of 1 image every 3 seconds. The surface tension was calculated by the shape of the drop and the result is expressed as a mean value of the 20 images. Three complete determinations were made and the mean value of these was used as the result. Because the solubility of the substance is greater than 1 g/l, a solution of 1g/l was used to determine the surface tension.

GLP compliance:

no

Type of method:

other: Pendant drop

Key result

Surface tension:

62 mN/m

Temp.:

20 °C

Conc.:

1 g/L

Conclusions:

Surface tension: 62 mN/m at 20 ºC

Executive summary:

The surface tension of the substance was determined by the pendant drop method. The surface tension was 62 mN/m at 20 °C. Since the test item showed a surface tension higher than 60 mN/m under the conditions of this method, the test item will not be regarded as as a surface-active material according to Council Regulation (EC) No 440/2008.

Description of key information

The surface tension of Polyol TD is 62 mN/m at 20 °C (Analytical Chemistry, Perstorp Holding AB, 2009). Since the test item showed a surface tension higher than 60 mN/m under the conditions of this method, the test item will not be regarded as as a surface-active material according to Council Regulation (EC) No 440/2008.

Key value for chemical safety assessment

Surface tension:

62

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

1 000