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EC number: 433-730-7 | CAS number: 23926-51-4 L-THREONINETHYLESTER
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:
- 2007.08.31 to 2007.11.29
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: Guideline study performed in accordance with GLP
- Reason / purpose for cross-reference:
- reference to same study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 104 (Vapour Pressure Curve)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.4 (Vapour Pressure)
- Deviations:
- no
- Principles of method if other than guideline:
- NA
- GLP compliance:
- yes
- Type of method:
- effusion method: vapour pressure balance
- Temp.:
- 20 °C
- Vapour pressure:
- 0.441 Pa
- Remarks on result:
- other: First vapour pressure
- Temp.:
- 25 °C
- Vapour pressure:
- 0.804 Pa
- Remarks on result:
- other: Second vapour pressure
- Conclusions:
- The vapour pressure of L-TEE was determined to be 0.441 at 20°C and 0.804 at 25°C.
- Executive summary:
The vapour pressure of L-TEE was determined in accordance with OECD guideline 104 and EU method A4, using a vapour pressure balance system.
The vapour pressure of L-TEE was determined in dublicate by the Knudsen Effucion Techninque with test temperature between 15°C and 30°C. Using the Clausius-Clapeyron equtation the mean vapour pressure were calculated to be 0.441 Pa at 20°C and 0.804 Pa at 25°C.
Reference
The vapour pressure of L-TEE was determined in dublicate from 14 runs. Using known relations between the vapour pressure, mass difference and temperature, a plot of LnVp (Pa) versus reciprocal temperature 1/T(K) therefore gives a straight line graph. From the regression of the Clausius-Clapeyron equation, the mean vapour pressure was calculated to be:
0.441 Pa at 20°C
0.804 Pa at 25°C
L-TEE did not change in appearance under the condition used in the determination of the vapour pressure.
Description of key information
The vapour pressure was determined to be 0.441 Pa at 20°C and 0.804 Pa at 25°C.
Key value for chemical safety assessment
- Vapour pressure:
- 0.441 Pa
- at the temperature of:
- 20 °C
Additional information
The vapour pressure of L-TEE was determined using Knudsen Effusion Technique with test temperatures between 15°C and 30°C.
Extrapolation of the vapour pressure based upon the simplified Clausius-Clapeyron equation resulted in vapour pressures of
0.441 Pa at 20 °C and 0.804 Pa at 25 °C.
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