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Physical & Chemical properties

Vapour pressure

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Reference
Endpoint:
vapour pressure
Type of information:
calculation (if not (Q)SAR)
Adequacy of study:
key study
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Reason / purpose:
reference to other study
Qualifier:
according to
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Deviations:
no
Qualifier:
according to
Guideline:
EU Method A.4 (Vapour Pressure)
Deviations:
no
Principles of method if other than guideline:
The vapour pressure was estimated by an atom/fragment contribution method using the software MPBPWIN.
GLP compliance:
yes
Type of method:
other: QSAR software MPBPWIN Version v1.42, 2000
Key result
Temp.:
25 °C
Vapour pressure:
0 Pa
Key result
Transition / decomposition:
yes
Transition temp.:
ca. 155 °C
Conclusions:
The vapour pressure of "TAZOBACTAM ACID" was estimated to 3.7*10-8 Pa at 25 °C.
Executive summary:

The vapour pressure was estimated by an atom/fragment contribution method using the software MPBPWIN. The vapour pressure of "TAZOBACTAM ACID" was estimated to 3.7*10-8 Pa at 25 °C.

Description of key information

Key study. The vapour pressure was estimated by an atom/fragment contribution method using the software MPBPWIN.The vapour pressure of"TAZOBACTAM ACID"was estimated to 3.7*10-8Pa at 25 °C.

Key value for chemical safety assessment

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

Additional information

If the melting point is between 200 °C and 300 °C, a limit value based on measurement or a recognised calculation method is sufficient. "TAZOBACTAM ACID" decomposed before melting (see Section 4.2). No melting temperature of the test substance could be determined and the melting point was estimated by an atom/fragment contribution method instead of. The calculated melting temperature of "TAZOBACTAM ACID" is 212.6 °C and therefore the vapour pressure can be calculated, instead of determined experimentally.