3,5-dimethylbenzoyl chloride

Surface tension

Administrative data

Endpoint:

surface tension

Type of information:

experimental study

Adequacy of study:

key study

Study period:

21 July 1992 - 4 Februsry 1993

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:

1993

Report date:

1993

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 surface tension was determined for a 90 % saturated aqueaous solution of the hydrolysis product.

GLP compliance:

yes

Type of method:

OECD harmonised ring method

Test material

Test material information

Constituent 1

Reference substance name:

3,5-dimethylbenzoyl chloride

EC Number:

413-010-9

EC Name:

3,5-dimethylbenzoyl chloride

Cas Number:

6613-44-1

Molecular formula:

C9H9ClO

IUPAC Name:

3,5-dimethylbenzoyl chloride

Details on test material:

DMBC
Appearance: clear, colourless liquid
Storage conditions: room temperature in the dark

Results and discussion

Surface tension

Surface tension:

64.6 mN/m

Temp.:

21 °C

Conc.:

90 vol%

Remarks on result:

other: Result for the hydrolysis product

Any other information on results incl. tables

CALIBRATION

Literature value for surface tension of water at 21 °C = 72.58 mN/m

Therefore Φb = 72.58 mN/m / 73.0 mN/m

= 0.99425

 

TEST SUBSTANCE

Surface tension readings for the test solutions are given in Table 1.

Surface tension of the blank solution was 71.5 mN/m showing that the test procedure has no significant effect on the surface tension of the water.

Test solution surface tension corrected for calibration factor:

 = 65.0 mN/m x 0.99425

= 64.6 mN/m

 

Table 1 Surface Tension Readings of Test Solutions at 21 °C

Time (minutes)	Measured Surface Tension (mN/m)
	Test 1	Test2
0 2 4 6	64.0 65.0 65.0 65.0	64.0 65.0 65.0 65.0
Mean of Last 3 Readings	65.0
Overall Mean	65.0

Applicant's summary and conclusion

Conclusions:

Evidence suggests that DMBC does not exist in aqueous media, being converted instantly to its acid. DMBC cannot therefore affect the surface tension of the water.

Conversely dimethylbenzoic acid has been found to affect the surface tension of water. A 90 % saturated aqueous solution showed a surface tension of 64.6 mN/m compared to that of distilled water, 73.0 mN/m (at 21 °C).

Executive summary:

A test to calculate the surface tenstion of DMBC was conducted in accordance with EU method A5. The surface tension was determined using the harmoised ring method.

DMBC cannot cause any significant effect on the surface tension of water but a 90 % saturated aqueous solution of its hydrolysis product has been found to possess a surface tension value of 64.6 mN/m at 21 °C.