O,O-bis(2-ethylhexyl) hydrogen dithiophosphate

Vapour pressure

Administrative data

Endpoint:

vapour pressure

Type of information:

experimental study

Adequacy of study:

key study

Study period:

26 Jun - 04 Jul 2017

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

comparable to guideline study

Cross-reference

Reason / purpose for cross-reference:

reference to other study

Reference

Endpoint:

appearance / physical state / colour

Type of information:

experimental study

Adequacy of study:

key study

Study period:

26 Jun - 04 Jul 2017

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other: Basic data given (comparable to guidelines/standards)

Reason / purpose for cross-reference:

reference to other study

Qualifier:

no guideline required

Principles of method if other than guideline:

Visual inspection during vapour pressure measurement.

Specific details on test material used for the study:

Storage conditions: room temperature in the dark

Physical state at 20°C and 1013 hPa:

liquid

Form:

liquid

Colour:

clear, colourless

Substance type:

organic

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2017

Report date:

2017

Materials and methods

Test guideline

Test guideline 1

Qualifier:

equivalent or similar to guideline

Guideline:

OECD Guideline 104 (Vapour Pressure Curve)

Test guideline 2

Qualifier:

equivalent or similar to guideline

Guideline:

EU Method A.4 (Vapour Pressure)

GLP compliance:

yes (incl. QA statement)

Remarks:

The Department of Health of the Government of the United Kingdom

Type of method:

effusion method: vapour pressure balance

Test material

Test material information

Constituent 1

Reference substance name:

O,O-bis(2-ethylhexyl) hydrogen dithiophosphate

EC Number:

227-376-0

EC Name:

O,O-bis(2-ethylhexyl) hydrogen dithiophosphate

Cas Number:

5810-88-8

Molecular formula:

C16H35O2PS2

IUPAC Name:

O,O-bis(2-ethylhexyl) sulfanylphosphonothioate

Specific details on test material used for the study:

Storage conditions: Room temperature in the dark

Results and discussion

Vapour pressure

Temp.:

25 °C

Vapour pressure:

0 hPa

Any other information on results incl. tables

Results
The values of vapor pressure at 25 °C extrapolated from each graph are summarized in the following table:

Table 1 – Summary of vapour pressure data

Run	Log10[Vp(25 °C)]
1	-1.34
2	-1.41
3	-1.48
4	-1.49
5	-1.48
Mean	-1.44
Vapour pressure	3.6E-04 hPa

 

The test item did not change in appearance under the conditions used in the determination.

Discussion
A total of 6 runs were completed for the main sequence. Thus the first 5 runs have been used to calculate the definitive vapor pressure value for the test item. Run 6 was not used due to the poor plot obtained.

The results may represent rounded-off values obtained by calculations based on the exact raw data.

Conclusion
The vapor pressure of the test item has been determined to be 3.6E-04 hPa at 25 ºC.