Benzoyl chloride, 3-methoxy-2-methyl-

Surface tension

Administrative data

Endpoint:

surface tension

Type of information:

experimental study

Adequacy of study:

key study

Study period:

23 September 1996 - 17 March 1997

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: Study conducted to GLP 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 the relevant results.

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

1998

Report date:

1998

Materials and methods

Test guideline

Qualifier:

according to guideline

Guideline:

EU Method A.5 (Surface Tension)

Deviations:

no

Principles of method if other than guideline:

The test substance hydrolyses almost immediately in contact with water. Therefore the surface tension has been determined on the hydrolysis product.

GLP compliance:

yes

Type of method:

OECD harmonised ring method

Test material

Test material information

Constituent 1

Reference substance name:

3-Methoxy-2-methylbenzoic acid

Cas Number:

55289-06-0

Molecular formula:

C9H10O3

IUPAC Name:

3-Methoxy-2-methylbenzoic acid

Test material form:

solid: particulate/powder

Remarks:

migrated information: powder

Details on test material:

MMBA
3-Methoxy-2-methylbenzoic acid
Appearance: white powder
Storage conditions: room temperature

Results and discussion

Surface tension

Surface tension:

72.2 mN/m

Temp.:

21 °C

Conc.:

90 other: % saturated solution

Any other information on results incl. tables

Density of water at 21 °C: 0.99800 g/cm3 (calculated from linear regression of the values at 20°C and 25°C)

Literature value for the surface tension of water: 72.58 mN/m (calculated from linear regression of the surface tension values for 15, 18, 20, 25 and 30 °C)

 

A summary of the corrected surface tension results are shown below, with the full uncorrected results detailed in Tables 1 and 2.

 

Distilled water: 73.16 mN/m. This result demonstrated that the instrument was calibrated correctly.

Test solution 1: 72.19 mN/m.

Test solution 2: 72.19 mN/m.

 

Mean of test solutions 1 and 2: 72.2 mN/m.

 

Table 1: Uncorrected Surface Tension Results for Distilled Water

Time	Surface Tension (mN/m)
	Before Test Solution Measurement	After Test Solution Measurement
0 2 4 6 8 10	77.2 77.1 77.2	77.0 76.7 77.3 77.3 77.0 77.3 77.4 77.3
Mean of Last 3 Values	77.17	77.33
Overall Mean	77.25

 

Table 2: Uncorrected Surface Tension Results for Test Solutions

Time	Surface Tension (mN/m)
	Test Solution 1	Test Solution 2
0 2 4 6 8 10	76.1 76.3 76.0 76.2 76.3 76.4	76.1 76.4 76.1 76.3 76.3 76.3
Mean of Last 3 Values	76.3	76.3

Applicant's summary and conclusion

Conclusions:

The surface tension of a 90% saturated aqueous solution of MMBA (3-methoxy-2-methylbenzoic acid) was determined to be 72.2 mN/m at 21°C.

Executive summary:

MMBC (3-Methyoxy-2-methylbenzoylchloride) hydrolyses almost immediately in contact with water. Therefore the surface tension was determined on the hydrolysis product, MMBA (3-methoxy-2-methylbenzoic acid).

Under the conditions of the test, the surface tension of a 90% saturated aqueous solution of MMBA (3-methoxy-2-methylbenzoic acid) was determined to be 72.2 mN/m at 21°C. The test was conducted in accordance with EU Method A.5.