Bis(2-ethylhexyl) phosphonate

Water solubility

Administrative data

Endpoint:

water solubility

Type of information:

experimental study

Adequacy of study:

key study

Study period:

13 - 26 Feb 2018

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2018

Materials and methods

Test guideline

Qualifier:

according to guideline

Guideline:

OECD Guideline 105 (Water Solubility)

Version / remarks:

July 27, 1995

GLP compliance:

yes

Type of method:

column elution method

Test material

Test material information

Constituent 1

Reference substance name:

Bis(2-ethylhexyl) phosphonate

EC Number:

222-904-6

EC Name:

Bis(2-ethylhexyl) phosphonate

Cas Number:

3658-48-8

Molecular formula:

C16H35O3P

IUPAC Name:

bis(2-ethylhexyl) phosphonate

Results and discussion

Water solubility

Key result

Water solubility:

1.29 mg/L

Conc. based on:

test mat.

Temp.:

20 °C

pH:

ca. 6

Any other information on results incl. tables

Confirmation of equilibrium state

The concentration of test item in the eluting fraction was measured four times after the test water was flowed at 0.4 mL/min through the column for measurement of water solubility. It was judged from the following results that the concentration had reached equilibrium after 48.0 hours.

Sampling time (hour)	Concentration (mg/L)	Relative standard deviation (%)
45.0	1.24
46.0	1.46	3.32
47.0	1.37
48.0	1.43

 

Test results

Flow rate	pH	Water solubility (mg/L)			Standard deviation	Maximum difference (%)
		Measurement value	Average	Average of all values
0.4 mL/min	5.9	1.38	1.32	1.29	0.0445	12.5
	5.9	1.28
	6.0	1.29
	6.0	1.34
	6.0	1.30
0.2 mL/min	6.0	1.24	1.27		0.0674
	6.0	1.21
	5.9	1.38
	6.0	1.25
	6.0	1.25

 

Water solubility of test item: 1.29 mg/L at 20 °C (pH ca. 6.0)

It was judged that the test results were valid because the maximum difference of concentration was less than 30%.