2,4-dimethyl-4-phenyltetrahydrofuran

Surface tension

Link to relevant study record(s)

Reference

Endpoint:

surface tension

Type of information:

experimental study

Adequacy of study:

key study

Study period:

14 June to 24 July 2013

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

OECD Guideline 115 (Surface Tension of Aqueous Solutions)

Qualifier:

according to guideline

Guideline:

EU Method A.5 (Surface Tension)

Qualifier:

according to guideline

Guideline:

other: ASTM D1331 - 11 Standard Test Methods for Surface and lnterfacial Tension of Solutions of Surface-Active Agents

Qualifier:

according to guideline

Guideline:

other: ISO 304 (1985)

Principles of method if other than guideline:

Not applicable

GLP compliance:

yes (incl. QA statement)

Type of method:

OECD harmonised ring method

Key result

Surface tension:

43.9 mN/m

Temp.:

20 °C

Conc.:

0.59 g/L

The results of the test are tabulated below.

Table 4.10/1: Surface tension of the test item

Determination	Surface tension reading [mN/m]
1	43.8
2	43.8
3	44.0
4	43.9
5	44.0
6	43.9
Mean	43.9

There is no significant change of the measured surface tension. Thus, it can be concluded that equilibrium is reached. Thus, the results obtained were averaged, to give the surface tension of the solution.
The result is: 43.9 mN/m.
Therefore, according to this test, it was considered that the test material is surface active (surface tension < 60 mN/m).

Conclusions:

According to EU A5 criteria, as the result is below the threshold value of 60 mN/m, the substance is considered to have surface-active potential under the experimental conditions.

Executive summary:

The surface tension of the test item was determined according to the OECD Guideline 115 (ring method) and under GLP.

The determination was performed on a 90% saturated solution (nominal concentration of 0.59 g/L) in ultrapure water, at 20°C. The average of six constant readings (±0.1 mN/m) was retained.

The surface tension of the test item solution is: 43.9 mN/m.

Description of key information

Experimental surface tension = 43.9 mN/m at 90% saturation (nominal 590 mg/L) and 20°C. (OECD 115, GLP)

According to EU A5 criteria, as the result is below the threshold value of 60 mN/m, the substance is considered to have surface-active potential under the experimental conditions. However, since the structure is not characteristic of a true surfactant, and it is not the intended use of the substance (i.e. not a desired property), this conclusion should be taken with caution.

Key value for chemical safety assessment

Surface tension:

43.9

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

590

Additional information

A fully reliable experimental study, conducted according to a recognized OECD method and under GLP, is available.
It is considered as a key study; the result is retained as key data for CSA.