Reaction mass of 2,2'-[methylenebis(oxymethylene)]bis[2-ethylpropane-1,3-diol]and propylidynetrimethanol and 2,2'-[oxybis(methylene)]bis[2-ethylpropane-1,3-diol]

Surface tension

Administrative data

Endpoint:

surface tension

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2012-05-10

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other: see 'Remark'

Remarks:

The surface tension analyses on water solutions have been done with a contact angle meter instrument according to the principle pendant drop. An internal method (A1577) was used. The results from this method have been compared with results obtained with the ring method. Good correlation was found between the pendant drop method (A1577) and the ring method.

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2012

Report date:

2012

Materials and methods

Principles of method if other than guideline:

Because the solubility of the substance is greater than 1 g/l, a solution of 1g/l was used to determine the surface tension. 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. Repeated measurements on the same drop showed that the surface tension for this substance decreased during time. Therefore several measurements were done for each drop until a constant surface tension was reached. The reported value is mean value of the constant surface tension which was reached after 10 minutes for three different drops.

GLP compliance:

no

Type of method:

other: pendant drop (correlate well to OECD 115)

Test material

Test material information

Constituent 1

Reference substance name:

Propylidynetrimethanol

EC Number:

201-074-9

EC Name:

Propylidynetrimethanol

Cas Number:

77-99-6

Molecular formula:

C6H14O3

IUPAC Name:

2-ethyl-2-(hydroxymethyl)propane-1,3-diol

Constituent 2

Reference substance name:

2,2'-[methylenebis(oxymethylene)]bis[2-ethylpropane-1,3-diol]

EC Number:

301-304-9

EC Name:

2,2'-[methylenebis(oxymethylene)]bis[2-ethylpropane-1,3-diol]

Cas Number:

93983-16-5

Molecular formula:

C13H28O6

IUPAC Name:

2,2'-[methylenebis(oxymethylene)]bis(2-ethylpropane-1,3-diol)

Constituent 3

Reference substance name:

2,2'-[oxybis(methylene)]bis[2-ethylpropane-1,3-diol]

EC Number:

245-509-0

EC Name:

2,2'-[oxybis(methylene)]bis[2-ethylpropane-1,3-diol]

Cas Number:

23235-61-2

Molecular formula:

C12H26O5

IUPAC Name:

2,2'-[oxybis(methylene)]bis(2-ethylpropane-1,3-diol)

Test material form:

solid

Details on test material:

Name of test material (as cited in study report): Reaction mass consisting of Trimethylolpropaneformal, Di-trimethylolpropane, Trimethylolpropane
- Substance type: organic
- Physical state: Solid
- Analytical purity: Mixture(GC purity %)
Trimethylolpropaneformal 29 %, Di-trimethylolpropane 28 % , Trimethylolpropane 12 % , Sodium formate 6.9 % , Unknown formal 2.5 %, Other unknowns 9 %
Lot/batch No: 251140-1
- Stability under test conditions: good
- Storage condition of test material: room temperature

Results and discussion

Surface tension

Surface tension:

58 mN/m

Temp.:

20 °C

Conc.:

1 g/L

Applicant's summary and conclusion

Conclusions:

Surface Tension is 58 mN/m at 20 ºC