Diphosphoric acid, P,P,P',P'-tetrakis(phenylmethyl) ester

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 2016-09-23 to

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Reason / purpose for cross-reference:

reference to same study

Reason / purpose for cross-reference:

reference to same study

Qualifier:

according to guideline

Guideline:

EU Method A.4 (Vapour Pressure)

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Remarks:

2015-07-28

Type of method:

effusion method: Knudsen cell

Key result

Temp.:

140 °C

Vapour pressure:

< 0.001 Pa

The mass of sample weighed for each assay was reported in the table below. The sample was placed in a Knudsen effusion cell. Then the cell was placed in the apparatus.

 

Assay No.	Test temperature t(°C)	Mass of test item (mg)	Knudsen effusion cell aperture size(µm)	Taken into account or not
1	90	6.91	279.9	No
2	100
3	110
4	120
5	110	11.01
6	130
7	140

 

No degradation of the test item was observed after the experimentations. No significative and reliable loss of mass was recorded during the different assays.

 

Discussion

No loss of mass of the test item was observed up to 140 °C. The temperature was not increased more as a decomposition of the test item was recorded during the melting point test at about 180 °C.

 

As a consequence, we can consider that the vapour pressure of the test item was lower than 10-3 Pa at 140 °C (temperature at which no loss of mass was observed and thus at which the test item was not decomposed) and by extrapolation the vapour pressure of the test item was largely lower than 10-3 Pa at 20 °C.

Conclusions:

The vapour pressure of the test item was lower than 10-3 Pa at 140 °C and thus the vapour pressure of the test item was largely lower than 10-3 Pa at 20 °C.

Executive summary:

The vapour pressure of Tetrabenzylpyrophosphate has been determined according to EC A.4 method in compliance with GLP.

The test material has been determined to have a vapour pressure of less to 0.001 Pa at 20°C using the dynamic effusion method.

Description of key information

The vapour pressure was determinated to be:

< 0.001 Pa at 140 °C

Additional information

An experimental study, scored as Klimisch 1, was seleted as a key study. It was performed in compliance with GLP according to EC A.4. test method.