Reaction mass of N1-benzylpropane-1,2-diamine and N2-benzylpropane-1,2-diamine

Surface tension

Link to relevant study record(s)

Reference

Endpoint:

surface tension

Type of information:

experimental study

Adequacy of study:

key study

Study period:

from 2016-10-19 to 2016-11-22

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:

1995

Deviations:

no

Qualifier:

according to guideline

Guideline:

EU Method A.5 (Surface Tension)

Version / remarks:

05/2008

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Type of method:

ring method

Key result

Surface tension:

67 mN/m

Temp.:

20 °C

Conc.:

1 g/L

Results:

The test item solution was held at constant temperature (20.0 ± 0.5 °C) in a temperature controlled room. The following values of the test item aqueous solution (ca. 100 mg / 100 mL) were recorded:

Measurement	Time expired (sec)*	Surface tension (mN/m)		Temperature (°C)
				before measurements	after measurements
1/1	65	67.4	67.1	19.6	19.6
	109	67.0
	151	67.0
	190	67.1
	231	67.1
	270	67.1
1/2	19	66.8	66.8
	58	66.8
	98	66.8
	138	66.8
	178	66.8
2/1	71	67.0	66.8	19.7	19.7
	115	66.8
	155	66.8
	195	66.8
	234	66.8
	275	66.8
2/2	13	66.0	66.5
	53	66.6
	95	66.5
	133	66.5
	175	66.5
	216	66.5
3/1	19	67.5	67.4	19.7	19.6
	59	67.4
	98	67.4
	138	67.4
	179	67.4
3/2	60	67.7	67.4
	104	67.4
	145	67.4
	185	67.4
	225	67.5
	267	67.5
		Mean:	67.0
		RSD:	0.54

  * Time expired since the test item solution was transferred into the test vessel.

Conclusions:

The surface tension of the test item in aqueous solution (ca. 100 mg / 100 mL) was found to be 67.0 mN/m. The density of the test solution was determined to be 0.998 g/mL. As this value is higher than 60 mN/m, the test item is not classified as surface active.

Executive summary:

The purpose of this study was to determine the surface tension of the solution of the test item applying the ring method according to EU A.5 and OECD 115 guidelines. The surface tension of the test item in aqueous solution (ca. 100 mg / 100 mL) was found to be 67.0 mN/m. The density of the test solution was determined to be 0.998 g/mL. As this value is higher than 60 mN/m, the test item is not classified as surface active.

Description of key information

The surface tension of the test item in aqueous solution (ca. 100 mg / 100 mL) was found to be 67.0 mN/m. As this value is higher than 60 mN/m, the test item is not classified as surface active.

Key value for chemical safety assessment

Surface tension:

67

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

1 000

Additional information

The purpose of this study was to determine the surface tension of the solution of the test item applying the ring method according to EU A.5 and OECD 115 guidelines. The surface tension of the test item in aqueous solution (ca. 100 mg / 100 mL) was found to be 67.0 mN/m. The density of the test solution was determined to be 0.998 g/mL. As this value is higher than 60 mN/m, the test item is not classified as surface active.