Phosphoric acid, butyl ester, sodium salt

Surface tension

Link to relevant study record(s)

Reference

Endpoint:

surface tension

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2018-02-06 to 2018-02-06

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)

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Type of method:

ring method

Key result

Surface tension:

32.9 mN/m

Temp.:

20 °C

Conc.:

1 g/L

The results of two measurements are summarized below:

Measured surface tension values

Value No.	1^stMeasurements s[mN/m]	2^ndMeasurement s[mN/m]
1	33.01	32.86
2	32.97	32.78
3	32.95	32.77
4	32.95	32.75
5	32.93	32.74
6	32.92	32.75
Mean value of the individual values	32.95 ± 0.03	32.77 ± 0.04
Total mean value	32.87 ± 0.13

The test item has a mean surface tension of 32.9 mN/m. Thus, the test item is to be regarded as surface active.

 

Conclusions:

The surface tension of test item at 20 °C and at a concentration 1 g/L was determined to be = 32.9 mN/m.

Executive summary:

A study was conducted according to OECD TG 115, Regulation (EC) No 440/2005 Part A, A.5, ASTM D1331-11 and ISO 304 (1985) to determine the surface tension of an aqueous solution of the test item using the ring method. A test solution of the test item was prepared in distilled water. For this purpose 100 mL double distilled water were added to 100.35 mg of the test item to create a solution with a concentration of 1.00 g/L. This solution was measured twice. The aqueous solution of the test item has a mean surface tension of 32.9 mN/m. Thus, the test item is to be regarded as surface active.

Description of key information

The surface tension of test item at 20 °C and at a concentration 1 g/L was determined to be = 32.9 mN/m.

Key value for chemical safety assessment

Surface tension:

32.9

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

20

Additional information

A study was conducted according to OECD TG 115, Regulation (EC) No 440/2005 Part A, A.5, ASTM D1331-11 and ISO 304 (1985) to determine the surface tension of an aqueous solution of the test item using the ring method. A test solution of the test item was prepared in distilled water. For this purpose 100 mL double distilled water were added to 100.35 mg of the test item to create a solution with a concentration of 1.00 g/L. This solution was measured twice. The aqueous solution of the test item has a mean surface tension of 32.9 mN/m. Thus, the test item is to be regarded as surface active.