3,5,8-Trioxa-4-phosphaundec-10-en-1-aminium, 4-hydroxy-N,N,N,10-tetramethyl-9-oxo-, inner salt, 4-oxide

Surface tension

Administrative data

Endpoint:

surface tension

Type of information:

experimental study

Adequacy of study:

key study

Study period:

12, 18 and 20 September 2007

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: Study conducted in compliance with agreed protocols, with no or minor deviations from standard test guidelines and/or minor methodological deficiencies, which do not affect the quality of relevant results.

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2008

Report date:

2008

Materials and methods

Test guideline

Qualifier:

according to guideline

Guideline:

EU Method A.5 (Surface Tension)

Version / remarks:

(using a White Electrical Institute interfacial tension balance and a procedure based on the ISO 304 ring method)

Deviations:

yes

Remarks:

Summary of deviation is in 'principles of method if other than guideline'

Principles of method if other than guideline:

The surface tension result was not corrected using the Harkins-Jordan correction table as the correction is not applicable to the apparatus used. Once calibrated, the balance and ring assembly used in this test give a direct reading for surface tension that is within the required accuracy (± 0.5 mN/m); this is as a result of the reduced ring dimensions. This deviation has been considered not to have affected the integrity of the study.

GLP compliance:

yes (incl. QA statement)

Remarks:

(Date of inspection: 21/08/2007 Date of signature: 15/10/2007)

Type of method:

ring method

Test material

Test material information

Constituent 1

Reference substance name:

-

EC Number:

417-560-0

EC Name:

-

Cas Number:

67881-98-5

Molecular formula:

C11H22NO6P

IUPAC Name:

trimethyl[2-({2-[(2-methylprop-2-enoyl)oxy]ethyl phosphonato}oxy)ethyl]azanium

Details on test material:

- Name of test material (as cited in study report): MPC
- Substance type: White powder
- Physical state: Solid
- Lot/batch No.:270103
- Storage condition of test material: at approximately 4°C, in the dark until 26th October and then over silica gel at approximately 4 °C in the dark

Results and discussion

Surface tension

Surface tension:

71.9 mN/m

Temp.:

22 °C

Conc.:

1 090 mg/L

Remarks on result:

other: pH of sample solution was 6.7

Any other information on results incl. tables

Substances showing a lower surface tension than 60 mN/m should be regaraded as being surface-active.

Applicant's summary and conclusion

Conclusions:

The surface tension of a 1.09 g/l solution of test material has been determined to be 71.9 m/N/m at 21.6 +/- 0.5 °C. The test material is considered not to be a surface active material.

Executive summary:

The surafce tension of the solution has been determined to be 71.9 mN/m at 21.6 +/- 0.5 °C, using method A5.

The deviation (results not corrected) from the guideline has been considered not to have affected the integrity of the study.

The test material has been determined not to be a surface active material.