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EC number: 947-957-9 | CAS number: -
Vapour pressure
Administrative data
Link to relevant study record(s)
- Endpoint:
- vapour pressure
- Type of information:
- experimental study
- Adequacy of study:
- weight of evidence
- Study period:
- 9th - 19th September, 2016
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 104 (Vapour Pressure Curve)
- Version / remarks:
- 23rd March, 2006
- Deviations:
- no
- GLP compliance:
- not specified
- Type of method:
- other: estimation using the Grain-Watson method
- Test no.:
- #1
- Temp.:
- 20 °C
- Vapour pressure:
- <= 6.3 Pa
- Test no.:
- #2
- Temp.:
- 50 °C
- Vapour pressure:
- <= 60 Pa
- Conclusions:
- The estimated vapour pressure is <= 6.3 Pa at 20°C and <= 60 Pa at 50°C.
- Executive summary:
The vapour pressure of the test item was determined in accordance with OECD TG 104. The experimentally-determined vapour pressure of the test item at 20°C was not in the recommended range of 1 to 1000 mbars for DSC measurements. Therefore an estimation procedure in accordance with OECD TG 104 was used (Grain-Watson method). This method is applied for vapour pressures between 10E03 to 10E-07 mbar. The estimated vapour pressure is <= 6.3 Pa at 20°C and <= 60 Pa at 50°C.
Reference
Description of key information
Based on a weight of evidence approach the test item has an estimated vapour pressure of 0.45 Pa at 20°C.
Key value for chemical safety assessment
- Vapour pressure:
- 0.45 Pa
- at the temperature of:
- 20 °C
Additional information
The vapour pressure of the test item was determined in accordance with OECD TG 104. The experimentally-determined vapour pressure of the test item at 20°C was not in the recommended range of 1 to 1000 mbars for DSC measurements. Therefore an estimation procedure in accordance with OECD TG 104 was used (Grain-Watson method). This method is applied for vapour pressures between 10E03 to 10E-07 mbar. The estimated vapour pressure is <= 6.3 Pa at 20°C and <= 60 Pa at 50°C.
A measured vapour pressure is available for Phosphoric acid, C4 and C12-14(even numbered) alkyl esters. Since this substance contains similar chain lengths as the C8 -12 esters, and in addition, a significant proportion of C4 esters, this measured result is considered to be more representative of the likely vapour pressure of the substance and is adopted for exposure assessment.
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