2,4-bis[N'-(4-methylphenyl)ureido]toluene

Surface tension

Administrative data

Endpoint:

surface tension

Type of information:

experimental study

Adequacy of study:

key study

Study period:

September 24, 1992 - September 25, 1992

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

1992

Report date:

1992

Materials and methods

Test guideline

Test guideline 1

Qualifier:

according to guideline

Guideline:

OECD Guideline 115 (Surface Tension of Aqueous Solutions)

Version / remarks:

1981

Deviations:

no

Test guideline 2

Qualifier:

according to guideline

Guideline:

EU Method A.5 (Surface Tension)

Version / remarks:

1984 and proposed updated version of November 1989

Deviations:

no

GLP compliance:

yes

Type of method:

OECD harmonised ring method

Test material

Test material information

Constituent 1

Reference substance name:

2,4-bis[N'-(4-methylphenyl)ureido]toluene

EC Number:

411-790-5

EC Name:

2,4-bis[N'-(4-methylphenyl)ureido]toluene

Cas Number:

54390-87-3

Molecular formula:

C23H24N4O2, C24H34N4O2

IUPAC Name:

3-(2-methyl-3-{[(4-methylphenyl)carbamoyl]amino}phenyl)-1-(4-methylphenyl)urea; 3-(2-methyl-5-{[(4-methylphenyl)carbamoyl]amino}phenyl)-1-(4-methylphenyl)urea; 3-{2-methyl-3-[(octylcarbamoyl)amino]phenyl}-1-(4-methylphenyl)urea

Test material form:

solid: particulate/powder

Details on test material:

- Name of test material (as cited in study report): KY-MA
- Lot/batch No.: 4HT059M
- Expiration date of the lot/batch: August 5, 1994
- Physical state: Light yellow solid
- Storage condition of test material: At room temperature in the dark

Specific details on test material used for the study:

water solubility: 6 µg/L

Results and discussion

Surface tension

Key result

Surface tension:

73.8 mN/m

Temp.:

20 °C

Remarks on result:

other: The concentration tested was assumed to be at approximate 6 µg/L (based on the water solubility result).

Any other information on results incl. tables

Calibration

The mean surface tension was determined to be 73.7 mN/m (measured at 19.8 - 19.7°C Celsius). The calibration factor was therefore 72.63/73.7 = 0.985

Results individual measurements

Measurement	Time expired [min]	Surface tension [mN/m]
		measured	mean	Mean corrected for calibration	Mean corrected for calibration and using Harkins and Jordan
1	26	75.0	74.9	73.8	73.8
2	27	75.0
3	28	74.8
4	29	74.7
5	30	74.8

 

Applicant's summary and conclusion

Conclusions:

The surface tension of an aqueous substance solution at complete saturation was determined to be 73.8 mN/m (at 20°C).

Executive summary:

The OECD harmonized ring method was applied for the determination of the surface tension of the substance, in accordance with OECD 115 (1981), EU Method A.5 (1984), proposed updated version of EU Method A.5 (November 1989) and according to GLP principles. The surface tension of a saturated solution of the substance at 20°C was 73.8 mN/m. As this value is well below the cut-off value for surface active substances (60 mN/m), the substance is considered to be not surface active. The concentration tested was assumed to be at approximate 6 µg/L (based on the water solubility result).