Poly[oxy[(hydroxymethyl)-1,2-ethanediyl]], .alpha.-dodecyl-.omega.-hydroxy-

Additional physico-chemical information

Administrative data

Endpoint:

other: critical micelle concentration

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2011

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other: Non GLP study carried out according to national guideline

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2011

Materials and methods

Test guideline

Qualifier:

according to guideline

Guideline:

other:

Principles of method if other than guideline:

Test guideline (if other than guideline, describe principles of method used):
Du Noüy Ring Tensiometer : This type of tensiometer uses a platinum ring which is submersed in a liquid. As the ring is pulled out of the liquid, the tension required is precisely measured in order to determine the surface tension of the liquid.
The Du Noüy Ring is a body of measure in platinum-iridium alloy for the determination of the superficial or interfacial tension from the maximal strength being exerted on the ring by using a tensiometer with ring or blade.

Details on test method
-Age of solution : 2 hours (max)
-Solution concentration : range from 1 to 50 g/L
-Type of water used : distilled water

GLP compliance:

no

Test material

Test material information

Constituent 1

Details on test material:

- Name of test material (as cited in study report): CHIMEXANE NV
- Substance type: solid
- Physical state: paste
- Analytical purity: as received
- Impurities (identity and concentrations): as received
- Composition of test material, percentage of components: as received
- Expiration date of the lot/batch: no data
- Stability under test conditions: stable after stabilization of the formed emulsion (when water is added to make the solutions).
- Storage condition of test material: room temperature, sheltered from sunlight.
- Other: none

Results and discussion

Results:

Results of measurement
-Value and unit : CMC = 0.006 g/L ;
TI = 4.66 mN/m
d = 1.023 g/cm3
TS = 23.74 mN/m

Any other information on results incl. tables

-Precise temperature: 21.1°C

-Assess uncertainty to demonstrate the quality of the measurement: each measure has been made (at least) twice

-Any observation made during experiment and relevant for result interpretation: cf. figure 1 (in attached file).

Applicant's summary and conclusion

Conclusions:

The interfacial tension has been determined by a double measure (made twice) of the surface tension between a aqueous solution (1% m/m) of the product and sunflower oil, at 20°C.

Executive summary:

Because of their tackiness, the test materials were, beforehand, put in the air oven to melt.

Some of the aqueous solutions formed an emulsion and were left in the air oven to stabilize.

The interfacial tension has been determined by a double measure (made twice) of the surface tension between a aqueous solution (1% m/m) of the product and sunflower oil, at 20°C.