Registration Dossier

Administrative data

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

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2009

Materials and methods

Test guideline
Qualifier:
equivalent or similar to
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

Test material

Reference
Name:
Unnamed
Type:
Constituent
Details on test material:
Polyol TD
- Substance type: mixture
- Physical state: liquid
- Lot/batch No.: 3577927
- Storage condition of test material: room temperature

- Composition of test material, percentage of components:
*5-ethyl-5hydroxymethyl-1,3-dioxane (CTF) 48.5 % (w/w) CAS 5187-23-5
*1,3-propanediol, 2-ethyl (DMP)19.2% (w/w) CAS 2612-29-5
*2-Ethyl-2-hydroxymethyl-1,3-propanediol (TMP) 15.1 % (w/w) CAS 77-99-6

Results and discussion

Surface tension
Surface tension:
62 mN/m
Temp.:
20 °C
Conc.:
1 g/L

Applicant's summary and conclusion

Conclusions:
Surface tension: 62 mN/m at 20 ºC
Executive summary:

Surface tension: 62 mN/m at 20 °C