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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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.

Diss Factsheets

Physical & Chemical properties

Vapour pressure

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Administrative data

Link to relevant study record(s)

Reference
Endpoint:
vapour pressure
Type of information:
calculation (if not (Q)SAR)
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
accepted calculation method
Qualifier:
according to guideline
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Deviations:
yes
Remarks:
the experimental determination was not possible due to the nature of the substance.
Qualifier:
according to guideline
Guideline:
EU Method A.4 (Vapour Pressure)
Deviations:
yes
Remarks:
the experimental determination was not possible due to the nature of the substance.
Principles of method if other than guideline:
Based on experience with a similar substance it was concluded that the experimental determination of the vapor preassure of EMCA is not possible due to the corrosive nature of acid chlorides on the analytical equipment.
As an alternative, the modified Watson correlation calculation method for the vapor pressure was used.
GLP compliance:
yes (incl. QA statement)
Key result
Test no.:
#1
Temp.:
25 °C
Vapour pressure:
176 Pa
Remarks on result:
not determinable because of methodological limitations
Remarks:
determined by calculation.
Conclusions:
Using the modified Watson correlation calculation method with boiling point as experimental value (183ºC), the vapor pressure of the test subtance at 25ºC was calculated to be 176 Pa (1.32 mm Hg).
Executive summary:

Based on experience with a similar substance it was concluded that the experimental determination of the vapor pressure of the test item is not possible due to the corrosive nature of acid chlorides on the analytical equipment. As an alternative, the modified Watson correlation calculation method for the vapor pressure was used. By using the modified Watson correlation calculation method with boiling point as experimental starting value (183ºC), the vapor pressure of the test subtance at 25ºC was calculated to be 176 Pa (1.32 mm Hg).

Description of key information

Key study. Accepted calculation method (Watson correlation calculation method). The vapour pressure of the test item is 176 Pa at 25ºC.

Supporting study. Accepted calculation method (EPI Suite v4.11 calculation. Mean VP of Antoine & Grain methods). The vapour pressure of the test item is 198 Pa at 25ºC.

Key value for chemical safety assessment

Vapour pressure:
176 Pa
at the temperature of:
25 °C

Additional information

Key study. Based on experience with a similar substance, it was concluded that the experimental determination of the vapor pressure of the test item is not possible due to the corrosive nature of acid chlorides on the analytical equipment. By using the modified Watson correlation calculation method with boiling point as experimental starting value (183ºC), the vapor pressure of the test subtance at 25ºC was calculated to be 176 Pa (1.32 mm Hg).

Supporting study. EPI Suite calculation method for the vapour pressure was used (Mean VP of Antoine & Grain methods). According to this method, the vapour pressure of the test item at 25ºC was calculated to be 198 Pa (1.48 mm Hg).