Registration Dossier
Registration Dossier
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.
The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.
Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 201-841-8 | CAS number: 88-58-4
Vapour pressure
Administrative data
Link to relevant study record(s)
- Endpoint:
- vapour pressure
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 1 (reliable without restriction)
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 104 (Vapour Pressure Curve)
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.4 (Vapour Pressure)
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- effusion method: vapour pressure balance
- Specific details on test material used for the study:
- Identification: di-tert-butyl hydroquinone
CAS No: 88-58-4
Appearance/Physical state: White solid
Batch: TS140610
Purity: 99.6%
Expiry date: 01 March 2019
Storage conditions: Room temperature in the dark - Key result
- Test no.:
- #3
- Temp.:
- 25 °C
- Vapour pressure:
- < 0.006 Pa
- Conclusions:
- The vapor pressure of di-tert-butyl hydroquinone has been determined to be less than 6.3 x 10-3 Pa at 25 °C,
- Executive summary:
The vapor pressure of di-tert-butyl hydroquinone has been determined to be less than 6.3 x 10-3 Pa at 25 °C, using the vapor pressure balance method, designed to be compatible with Method A.4 Vapour Pressure of Commission Regulation (EC) No 440/2008 of 30 May 2008 and Method 104 of the OECD Guidelines for Testing of Chemicals, 23 March 2006.
Reference
The test item did not change in appearance under the conditions used in the determination.
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 vapor pressure at 25 ºC.
Run 3 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 30 ºC (303 K) was chosen because this is the data point which gives the highest estimated vapor 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 vapor pressure on a wide range of samples using the vapor pressure balance method. Extrapolation to 25 ºC gave a vapor pressure of 6.29 x 10-3 Pa which has been taken as a maximum for this material.
The results may represent rounded values obtained by calculations based on the exact raw data. Conclusion
The vapor pressure of the test item has been determined to be less than 6.3 x 10-3 Pa at 25 ºC.
Description of key information
Key value for chemical safety assessment
- Vapour pressure:
- 0.006 Pa
- at the temperature of:
- 25 °C
Additional information
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
