Ethylidynetrimethanol

Surface tension

Administrative data

Endpoint:

surface tension

Type of information:

experimental study

Adequacy of study:

key study

Study period:

Experimental phase started 16th June 2016 and completed on the 15th January 2017.

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2017

Report date:

2017

Materials and methods

Test guideline

Qualifier:

according to guideline

Guideline:

EU Method A.5 (Surface Tension)

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Test material

Test material information

Constituent 1

Reference substance name:

Ethylidynetrimethanol

EC Number:

201-063-9

EC Name:

Ethylidynetrimethanol

Cas Number:

77-85-0

Molecular formula:

C5H12O3

IUPAC Name:

2-(hydroxymethyl)-2-methylpropane-1,3-diol

Test material form:

solid: granular

Results and discussion

Surface tension

Key result

Surface tension:

72 mN/m

Temp.:

21.5 °C

Conc.:

1 g/L

Any other information on results incl. tables

 Results

The readings, times and temperatures for the sample solutions are shown in the following tables:

Table 10          Sample 1

Time (mins)	Reading (mN/m)	Temperature (°C)
72	72.0	21.4
91	72.0	21.4
102	72.0	21.4
113	72.0	21.4
124	72.0	21.4

Table 11– Sample 2

Time (mins)	Reading (mN/m)	Temperature (°C)
142	72.0	21.6
151	72.0	21.6
161	72.0	21.6
171	72.0	21.6
180	72.0	21.6

Mean Sample 1 result:          72.0 mN/m                 pH of Sample 1 :       7.2

Mean Sample 2 result:          72.0 mN/m                 pH of Sample 2 :       7.0

Mean result                :          72.0 mN/m

Temperature              :          21.5 ± 0.5 ºC

Applicant's summary and conclusion

Conclusions:

The mean surface tension of the test item in water (nominal 1 g/L) has been determined to be 72.0 mN/m at 21.5 ± 0.5 °C. The test item was considered not to be surface-active.