Triethyl phosphonoacetate

Vapour pressure

Link to relevant study record(s)

Reference

Endpoint:

vapour pressure

Type of information:

experimental study

Adequacy of study:

key study

Study period:

From 16 December 2011 to 4 May 2012

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Remarks:

Study conducted in compliance with international and OECD standard guidelines under GLP conditions. The study report was well documented with all mandatory information included.

Qualifier:

according to guideline

Guideline:

OECD Guideline 104 (Vapour Pressure Curve)

Deviations:

no

Qualifier:

according to guideline

Guideline:

EU Method A.4 (Vapour Pressure)

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Remarks:

2011-08-31

Type of method:

effusion method: vapour pressure balance

Temp.:

25 °C

Vapour pressure:

0.61 Pa

Remarks on result:

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

Transition / decomposition:

no

All the raw data on the results of the vapor pressure determination are given in Attachment 1.

Summary of results :

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

Run	Log [Vp(25°C]
4	-0.212
5	-0.211
6	-0.219
7	-0.214
Mean	-0.214
Vapour pressure	6.1*10^-1Pa

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

A total of 7 runs were completed for the main sequence. Equilibrium with regard to vapour pressure was assessed to have been reached over the final four runs. Thus the final four runs have been used to calculate the definitive vapour pressure value to the test item.

Conclusions:

The vapour pressure of the test item has been determined to be 0.61 Pa at 25°C.

Executive summary:

The vapour pressure was carried out according to Method A4 Vapour Pressure of Commission Regulation (EC) No 440/2008 of 30 May 2008, Method 104 of the OECD Guidelines for Testing Chemicals and according to GLP. No deviation from the guideline was observed.

The vapour pressure was determined using a vapour pressure balance with measurements being made at several temperature and linear regression analysis used to calculated the vapour pressure at 25°C.

A preliminary run was undertaken, over the temperature range 20 to 37°C to provide information for a suitable temperature range for the determination.

A total of 7 runs were completed for the main sequence. Equilibrium with regard to vapour pressure was assessed to have been reached over the final four runs. Thus the final four runs have been used to calculate the definitive vapour pressure value to the test item. The test item did not change in appearance under the conditions used in the determination.

The vapour pressure of the test item has been determined to be 6.1*10 ^-1 Pa at 25°C.

Description of key information

Experimental value of vapour pressure for the test item at 25°C: 0.61Pa.

Key value for chemical safety assessment

Vapour pressure:

0.61 Pa

at the temperature of:

25 °C

Additional information

The vapour pressure was carried out using a procedure designed to be compatible with Method A4 Vapour Pressure of Commission Regulation (EC) No 440/2008 of 30 May 2008, Method 104 of the OECD Guidelines for Testing Chemicals and according to GLP. No deviation from the guideline was observed.

A total of 7 runs were completed for the main sequence. Equilibrium with regard to vapour pressure was assessed to have been reached over the final four runs. Thus the final four runs have been used to calculate the definitive vapour pressure value to the test item.