Pentaerythritol tetrakis(3-mercaptopropionate)

Vapour pressure

Link to relevant study record(s)

Reference

Endpoint:

vapour pressure

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2008.05.09-2008.05.12

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: GLP-Guideline study

Qualifier:

according to guideline

Guideline:

EU Method A.4 (Vapour Pressure)

Deviations:

no

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

Temp.:

25 °C

Vapour pressure:

< 0 Pa

Remarks on result:

other: vapour pressure balance

Transition / decomposition:

no

No statistical analyses were performed because the balance readings were too low and variable for a line of best fit to have any meaning. Instead it was considered more appropriate to impose a regression slope on a chosen data point to provide an estimate of the maximum value for the vapour pressure at 25 °C.

Run 4 (from 5 runs) was chosen because the sample had been under vacuum for the longest period prior to this run and so degassing would have been the most complete. The reading at 91 °C (364.15 K) was chosen because this is the data point which gives the highest estimated vapour pressure at any given temperature when a slope of -1500 K is imposed upon it.

The value of -1500 K is an in-house value and is the shallowest slope observed whilst determining the vapour pressure on a wide range of samples using the vapour pressure balance method. Extrapolation to 25 °C gave a vapour pressure of 4.150x10 ^-4 Pa which has been taken as a maximum for this material. The test material did not change in appearance under the conditions used in the determination.

Conclusions:

The vapour pressure of the test substance Pentaerythritol tetra (3-mercaptopropionate) has been determined to be less than 0.00042 Pa at 25 °C.

Executive summary:

The test substance Pentaerythritol tetra (3-mercaptopropionate) has been determined to have a vapour pressure of less than 0.00042 Pa at 25 °C by using a vapour pressure balance, according to Method A4 of Commission Directive 92/69/EEC (which constitutes Annex V of Council Directive 67/548/EEC).

Description of key information

Vapour pressure: < 4.2x10-6 hPa at 25 °C
Tremain, S.P. (2008)

Key value for chemical safety assessment

Vapour pressure:

0 Pa

at the temperature of:

25 °C

Additional information

In the experimental laboratory study the vapour pressure of the test material THIOCURE PETMP, Pentaerythritol tetra (3-mercaptopropionate) has been determined to be less than 4.2x10^-6 hPa at 25 °C. The studies were carried out by using a vapour pressure balance, according to Method A4 of Commission Directive 92/69/EEC (which constitutes Annex V of Council Directive 67/548/EEC).