Registration Dossier
Registration Dossier
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EC number: 807-619-2 | CAS number: 65535-29-7
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:
- 1997
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- guideline study without detailed documentation
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.4 (Vapour Pressure)
- GLP compliance:
- no
- Remarks:
- Draft report
- Type of method:
- effusion method: Knudsen cell
- Temp.:
- 20 °C
- Vapour pressure:
- 0 Pa
- Remarks on result:
- other: 95 % confidence interval: 4.8*10 E-10-1.3*10 E·8 Pa
- Key result
- Temp.:
- 25 °C
- Vapour pressure:
- 0 Pa
- Remarks on result:
- other: 95 % confidence interval: 1.2*10 E-9-2.7*10 E·8 Pa
- Temp.:
- 30 °C
- Vapour pressure:
- 0 Pa
- Remarks on result:
- other: 95 % confidence interval: 3.1*10 E-9-5.7*10 E·8 Pa
- Conclusions:
- The vapour pressure of Epoxid-Valerat was 5.8 x 10 E-9 Pa measured at 25°C.
- Executive summary:
The temperature dependence of the vapour pressure was determined according to the guidance A.4 of the European Community (Anhang zur Richtlinie 92/69/EEC vom 31.07.1992). The vapour pressure was measured with a vapour pressure balance in the temperature range 120-150 °C corresponding to the Knudsen effusion method. For measurement, the vapour jet of the test substance leaving a heatable Knudsen cell through an aperture of known size under high vacuum conditions is condensed on the cooled scale pan of a precision Cahn-microbalance. The vapour pressures were calculated for 20, 25 and 30 °C using a semilogarithmic linear regression based on the Antoin equation. The vapour pressure of Epoxid-Valerat at 20, 25 and 30 °C were determined as 2.5 x 10E-9, 5.8 x 10E-9 and 1.3 x 10E-8 Pa, respectively.
Reference
Pretest Information:
A differential thermoanalysis method (DTA) was used to determine the transition temperatures of the test item to be:
- Melting range: 79 -124 °C (DTA-endotherm peak)
- Decomposition: 147- 407 °C (DTA-exotherm peak)
Description of key information
The vapour pressure of Epoxid-Valerat was determined as 5.8 x 70E-9 Pa at 25 °C.
Key value for chemical safety assessment
- Vapour pressure:
- 0 Pa
- at the temperature of:
- 25 °C
Additional information
The vapor pressures measured at 20 and 30 °C were 2.5 x 10-9 Pa and 1.3 x 10-8 Pa.
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