4-Morpholinepropanal, .alpha.,.alpha.-dimethyl-

Surface tension

Link to relevant study record(s)

Reference

Endpoint:

surface tension

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2013-04-30 to 2013-05-03

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

OECD Guideline 115 (Surface Tension of Aqueous Solutions)

Version / remarks:

adopted 27 July 1995

Deviations:

no

Qualifier:

according to guideline

Guideline:

EU Method A.5 (Surface Tension)

Version / remarks:

dated 31 May 2008

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Type of method:

plate method

Key result

Surface tension:

67.27 mN/m

Temp.:

19.9 °C

Conc.:

855.63 mg/L

Measured Values Negative Control

Measurement	Time	Mass	Surface Tension	Temperature
No	s	g	mN/m	°C
1	2.9	0.2979	72.67	20.4
2	5.9	0.2972	72.50	20.4
3	8.9	0.2973	72.53	20.4
4	11.8	0.2973	72.53	20.4
5	14.9	0.2977	72.62	20.4
6	17.8	0.2971	72.48	20.4
7	20.9	0.2972	72.50	20.4
8	23.8	0.2972	72.50	20.4
9	26.9	0.2971	72.48	20.4
10	29.8	0.2970	72.45	20.4
Mean			72.53
Standard Deviation			0.07

The surface tension of the negative control was determined to be 72.53 mN/m at 20.4 °C, therefore showing a difference of 0.19 % from the stated literature value. The difference lies within the accepted range of 1 % deviation from literature value.

The test item solution was held at constant temperature (20.0 ± 0.5 °C). 59 minutes after conclusion of the first measurement series, a second measurement series was performed for verification purposes.

The following values were recorded:

Measured Values Test Item First Series

Measurement	Time	Mass	Surface Tension	Temperature
No	s	g	mN/m	°C
1	2.9	0.2761	67.35	19.9
2	5.9	0.2755	67.21	19.9
3	8.9	0.2757	67.26	19.9
4	11.9	0.2758	67.28	19.9
5	14.9	0.2756	67.23	19.9
6	17.9	0.2758	67.28	19.9
7	20.9	0.2758	67.28	19.9
8	23.9	0.2759	67.30	19.9
9	26.9	0.2757	67.26	19.9
10	29.9	0.2756	67.23	19.9
Mean			67.27
Standard Deviation			0.04

 

 Measured Values Test Item Second Series

Measurement	Time	Mass	Surface Tension	Temperature
No	s	g	mN/m	°C
1	2.9	0.2764	67.43	20.0
2	5.8	0.2765	67.45	20.0
3	8.9	0.2765	67.45	20.0
4	11.9	0.2770	67.57	20.0
5	14.9	0.2768	67.52	20.0
6	17.8	0.2767	67.50	20.0
7	20.9	0.2764	67.43	20.0
8	23.8	0.2764	67.43	20.0
9	26.9	0.2764	67.43	20.1
10	29.8	0.2768	67.52	20.1
Mean			67.47
Standard Deviation			0.05

 

Conclusions:

The surface tension of the test item was determined to be 67.27 ± 0.04 mN7m at 19.9 °C. As all measured values were higher than 60 mN/m, thus the test item was not classified as surface active.

Executive summary:

A study was conducted according to OECD TG 115 and Regulation (EC) No 440/2008 method A.5 to determine the surface tension of the test item. The study was performed using the plate method. Therefore a 90 % saturated test item solution was prepared. The concentration of the 90 % saturated test solution was determined with 855.63 mg test item/L via DOC (dissolved organic carbon) measurement. The measurement was performed in duplicated. One measurement was performed for verification purposes after 59 minutes. No relevant changes and thus no dependence of surface tension on time were observed. The surface tension of an aqueous solution of the test item was determined to be 67.27 ± 0.04 mN/m at 19.9 °C and 855.63 mg/L. The surface tension of the negative control was determined to be 72.53 mN/m at 20.4 °C, therefore showing a difference of 0.19 % from the stated literature value. The difference lies within the accepted range of 1 % deviation from literature value. Therefore, the result of the test is considered valid and the test item is not classified as surface active. 

Description of key information

The surface tension of the test item was determined to be 67.27 ± 0.04 mN7m at 19.9 °C. As all measured values were higher than 60 mN/m, thus the test item was not classified as surface active.

Key value for chemical safety assessment

Surface tension:

67.27

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

855.63

Additional information

A study was conducted according to OECD TG 115 and Regulation (EC) No 440/2008 method A.5 to determine the surface tension of the test item. The study was performed using the plate method. Therefore a 90 % saturated test item solution was prepared. The concentration of the 90 % saturated test solution was determined with 855.63 mg test item/L via DOC (dissolved organic carbon) measurement. The measurement was performed in duplicated. One measurement was performed for verification purposes after 59 minutes. No relevant changes and thus no dependence of surface tension on time were observed. The surface tension of an aqueous solution of the test item was determined to be 67.27 ± 0.04 mN/m at 19.9 °C and 855.63 mg/L. The surface tension of the negative control was determined to be 72.53 mN/m at 20.4 °C, therefore showing a difference of 0.19 % from the stated literature value. The difference lies within the accepted range of 1 % deviation from literature value. Therefore, the result of the test is considered valid and the test item Is not classified as surface active.