4-pentylcyclohexanone

Surface tension

Link to relevant study record(s)

Reference

Endpoint:

surface tension

Type of information:

experimental study

Adequacy of study:

key study

Study period:

1990-08-15 to 1990-12-13

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

EU Method A.5 (Surface Tension)

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Type of method:

OECD harmonised ring method

Key result

Surface tension:

46.6 mN/m

Temp.:

20 °C

Conc.:

2 mg/L

( a ) Summary 

The surface tension of a saturated test item solution at 20 °C in water was determined to be 46.6 mN/m.

 

(b) presentation of the results including calculation and statistical methods 

I) calibration of the apparatus 

1. measurement:          73.5 mN/m

2. measurement:          73.5 mN/m

3. measurement:          73.5 mN/m

The reference value of water at 20 °C was 72.75 mN/m. Thus the calibration factor was determined to be 0.9898.

 

II) measurement of the test item solution 

The measurement was performed 2 hours after preparation of the test item solution. The concentration of the saturated aqueous solution was approx. 2 mg/mL. The measurement was performed at 20 °C. 

	1. measurement	2. measurement	3. measurement	Mean
After 5 min	48.7 mN/m	48.4 mN/m	48.6 mN/m	48.6 mN/m
After 10 min	48.5 mN/m	48.7 mN/m	48.6 mN/m	48.6 mN/m
After 15 min	48.5 mN/m	48.7 mN/m	48.6 mN/m	48.6 mN/m
After 20 min	48.5 mN/m	48.8 mN/m	48.6 mN/m	48.6 mN/m
After 25 min	48.5 mN/m	48.7 mN/m	48.6 mN/m	48.6 mN/m
After 30 min	48.5 mN/m	48.7 mN/m	48.6 mN/m	48.6 mN/m

 

The value was corrected using the correction factor of 0.9898 according to Harkins und Jordan" to be 46.6 mN/m.

Conclusions:

The surface tension was determined to be 46.6 mN/m at 20 °C. Thus, the substance was regarded as surface active.

Executive summary:

A study was conducted according to Regulation (EC) No 440/2005 Part A, A.5 to determine the surface tension of an aqueous solution of the test item using the ring method. Therefore a saturated solution of the test substance in ultrapure water was prepared at 2 mg/mL. The solution was allowed to stabilising at the test temperature of 20 °C. The surface tension was determined to be 46.6 mN/m at 20 °C. It was considered that the test item was surface active as the surface tension is below 60 mN/m.

Description of key information

The surface tension was determined to be 46.6 mN/m at 20 °C. Thus, the substance was regarded as surface active (reference 4.10 -1).

Key value for chemical safety assessment

Surface tension:

46.6

in mN/m at 20°C and concentration in mg/L:

2

Additional information

A study was conducted according to Regulation (EC) No 440/2005 Part A, A.5 to determine the surface tension of an aqueous solution of the test item using the ring method (reference 4.10 -1). Therefore a saturated solution of the test substance in ultrapure water was prepared at 2 mg/mL. The solution was allowed to stabilising at the test temperature of 20 °C. The surface tension was determined to be 46.6 mN/m at 20 °C. It was concluded that the test item was surface active as the surface tension is below 60 mN/m.