Trimorpholinophosphine oxide

Surface tension

Administrative data

Endpoint:

surface tension

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2018

Report date:

2018

Materials and methods

Test guideline

Qualifier:

according to guideline

Guideline:

OECD Guideline 115 (Surface Tension of Aqueous Solutions)

GLP compliance:

no

Type of method:

ring method

Test material

Test material information

Constituent 1

Reference substance name:

Trimorpholinophosphine oxide

EC Number:

224-662-7

EC Name:

Trimorpholinophosphine oxide

Cas Number:

4441-12-7

Molecular formula:

C12H24N3O4P

IUPAC Name:

trimorpholinophosphine oxide

Test material form:

solid

Results and discussion

Surface tension

Key result

Surface tension:

71.8 mN/m

Temp.:

20 °C

Conc.:

999.6 mg/L

Any other information on results incl. tables

An aqueous solution of the test item in de-ionized water with a concentration of 999.6 mg/l was prepared and adapted to 20 °C. The measurement of the surface tension with the test item was carried out at 20 ± 0.5°C (19.9 °C), as follows:

The solution to be measured was transferred to the measurement vessel, taking care to avoid foaming. The measurement vessel was placed on the table of the test apparatus. The measurement vessel was raised until the ring was immersed below the surface of the solution. The time from starting the measurement was recorded. Subsequently, the table top was lowered gradually and evenly at a rate of 0.3 cm/min to detach the ring from the surface until the maximum force was reached. The force was read on the tensiometer. The measurements were repeated until 6 measurements were within the limits of the stability criterion.

Table 1: Surface tension

Measurement	1	2	3	4	5	6
Time (s)	26	146	267	389	510	632
surface tension (uncorrected)	77.40	77.35	77.34	77.33	77.32	77.31
surface tension (corrected acc. to Zuidema and Waters)	71.90	71.84	71.84	71.83	71.82	71.81

Mean value = 71.84 mN/m (corrected according to Zuidema and Waters)

The surface tension showed a minor tendency. This tendency was well within the deviation of the test method and could therefore be neglected. The aqueous solution of the test item had a mean surface tension of 71.8 mN/m. As the surface tension was higher than 60 mN/m, the test item had no surface-active properties.

Applicant's summary and conclusion

Conclusions:

The surface tension of the aqueous solution at 20 °C had a mean value of 71.8 mN/m. The test item had no surface-active properties.