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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Administrative data

surface tension
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Accepted well-documented technique which meets scientific principles The pendant drop method has been compared to the ring method OECD 115 and gave good correlation. See company report no W09-2478.

Data source

Reference Type:
study report

Materials and methods

Test guideline
equivalent or similar to guideline
OECD Guideline 115 (Surface Tension of Aqueous Solutions)
Principles of method if other than guideline:
Method: Pendant drop, Perstorp A1577 (correlates well to OECD 115), se company report no W09-2478.
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.
GLP compliance:
Type of method:
other: pendant drop

Test material

Constituent 1
Chemical structure
Reference substance name:
2-Oxepanone, polymer with 1,4-butanediol
EC Number:
Cas Number:
Molecular formula:
2-Oxepanone, polymer with 1,4-butanediol
Details on test material:
Name of test material (as cited in study report): Capa™ 2043
- Substance type: organic
- Physical state: Liquid
- Analytical purity: Mixture(GC purity) 1,4-butandiol 1.7 % , 1,4-butandiol -1ECL 11.1 %, 1,4-butandiol -2ECL 21.6 %, 1,4-butandiol -3ECL 24.8 %, 1,4-butandiol -4ECL 20.6 %, 1,4-butandiol -5ECL 12.9 %, 1,4-butandiol -6ECL 5.9 %, 1,4-butandiol -7ECL 1.6 %
- Lot/batch No: WNI 342 27/1/09 WAC000378
- Stability under test conditions: good
- Storage condition of test material: room temperature

Results and discussion

Surface tension
Surface tension:
53 mN/m
20 °C
1 g/L

Applicant's summary and conclusion

Surface Tension: 53 mN/m at 20 ºC
Executive summary:

Surface Tension: 53 mN/m at 20 ºC