Registration Dossier
Registration Dossier
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EC number: 946-149-3 | CAS number: 1571954-81-8
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:
- 2013. 8. 26 ~ 2013. 10. 3
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 104 (Vapour Pressure Curve)
- Deviations:
- no
- GLP compliance:
- not specified
- Type of method:
- effusion method: Knudsen cell
- Key result
- Test no.:
- #1
- Temp.:
- 25 °C
- Vapour pressure:
- 0 Pa
- Key result
- Test no.:
- #2
- Temp.:
- 50 °C
- Vapour pressure:
- 0 Pa
- Key result
- Test no.:
- #3
- Temp.:
- 80 °C
- Vapour pressure:
- 0 Pa
- Conclusions:
- The vapour pressure of GL500 was determined to be 2.62 x 10-6 Pa at 25 °C (298 K), 5.30 x 10-6 Pa at 50 °C (323 K) and 2.83 x 10-5 Pa at 80 °C (353 K), respectively.
- Executive summary:
The method is based on the estimation of the mass of test substance flowing out per unit of time of a Knudsen cell in the form of vapour, through a micro-orifice under ultra-vacuum conditions. The mass of
effused vapour can be obtained either by determining the loss of mass of the cell or by condensing the vapour at low temperature and determining the amount of volatilized substance using chromatography.
The vapour pressure is calculated by applying the Hertz-Knudsen relation with correction factors that depend on parameters of the apparatus. The recommended range is 10-10 to 1 Pa.
The evaporation rate was measured under high vacuum at 25 °C (298 K), 50 °C (323 K), 80 °C (353 K) and the weight loss was estimated to be vapour loss. The vapour pressure was calculated by Hertz-
Knudsen equation.
The vapour pressure of GL500 was determined to be 2.62 x 10-6 Pa at 25 °C (298 K), 5.30 x 10-6 Pa at 50 °C (323 K) and 2.83 x 10-5 Pa at 80 °C (353 K), respectively.
Reference
Description of key information
The vapour pressure of GL500 was determined to be 2.62 x 10-6 Pa at 25 °C (298 K), 5.30 x 10-6 Pa at 50 °C (323 K) and 2.83 x 10-5 Pa at 80 °C (353 K), respectively.
Key value for chemical safety assessment
- Vapour pressure:
- 0 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.
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