2(1H)-Naphthalenone, 3,4-dihydro-5-methoxy-

Surface tension

Administrative data

Endpoint:

surface tension

Type of information:

experimental study

Adequacy of study:

key study

Study period:

March 21, 2006 - March 22, 2006

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2006

Report date:

2006

Materials and methods

Test guideline

Test guideline 1

Qualifier:

according to guideline

Guideline:

OECD Guideline 115 (Surface Tension of Aqueous Solutions)

Version / remarks:

July 27, 1995

Deviations:

no

Test guideline 2

Qualifier:

according to guideline

Guideline:

EU Method A.5 (Surface Tension)

Version / remarks:

December 1992

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Type of method:

ring method

Test material

Test material information

Constituent 1

Reference substance name:

-

EC Number:

457-080-9

EC Name:

-

Cas Number:

32940-15-1

Molecular formula:

C11H12O2

IUPAC Name:

5-methoxy-1,2,3,4-tetrahydronaphthalen-2-one

Test material form:

solid: compact

Details on test material:

- Description: White-yellowish solid

Results and discussion

Surface tension

Key result

Surface tension:

58.6 mN/m

Temp.:

20.2 °C

Remarks on result:

other: Conc.= 90% of test item saturation solubility. Mean of duplicate measurements.

Any other information on results incl. tables

Experiment 1:

Time expired [hours:min]	Temperature [°C]	Surface tension (mN/m)
		Measured	Mean	Mean multiplied by the calibration factor
00:32	20.2	57.6	57.52	59.33
00:33	20.2	57.5
00:35	20.2	57.5
00:36	20.2	57.5
00:37	20.2	57.5
00:39	20.2	57.5

Mean multiplied by the calibration factor and Harkins-Jordan corrected: 58.40 mN/m

 

Experiment 2:

Time expired [hours:min]	Temperature [°C]	Surface tension (mN/m)
		Measured	Mean	Mean multiplied by the calibration factor
00:36	20.2	57.9	57.82	59.64
00:37	20.2	57.8
00:38	20.2	57.8
00:39	20.2	57.8
00:40	20.2	57.8
00:41	20.2	57.8

Mean multiplied by the calibration factor and Harkins-Jordan corrected: 58.72 mN/m

Applicant's summary and conclusion

Conclusions:

The surface tension of an aqueous substance solution at 90% of its saturation solubility was determined to be 58.6 mN/m (at 20.2°C).

Executive summary:

Using the OECD harmonized ring method in a GLP study according to EC A.5 and OECD 115, the surface tension of an aqueous substance solution at 90% of its saturation solubility was determined to be 58.6 mN/m (at 20.2°C). According to the EC A.5 guideline the substance is surface active.