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EC number: 231-472-8 | CAS number: 7575-23-7
Vapour pressure
Administrative data
Link to relevant study record(s)
- 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
- 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).
Reference
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.
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).
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