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Physical & Chemical properties

Vapour pressure

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Reference
Endpoint:
vapour pressure
Type of information:
(Q)SAR
Adequacy of study:
key study
Study period:
Not applicable
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
accepted calculation method
Justification for type of information:
1. SOFTWARE

MPBPWIN, part of the US EPA’s EPISuite software

2. MODEL (incl. version number)

MPBPWIN v.1.43

3. SMILES OR OTHER IDENTIFIERS USED AS INPUT FOR THE MODEL

CC(=O)O[Rh](OC(=O)C)OC(=O)C

4. SCIENTIFIC VALIDITY OF THE (Q)SAR MODEL

See attached QMRF

5. APPLICABILITY DOMAIN

See attached QMRF and QPRF

6. ADEQUACY OF THE RESULT

See attached QMRF and QPRF
Principles of method if other than guideline:
The vapour pressure was estimated using EPISuite v4.1 (US EPA 2010) using MPBVP v1.43. MPBPWIN estimates vapor pressure (VP) by three separate methods: (1) the Antoine method, (2) the modified Grain method, and (3) the Mackay method. All three use the normal boiling point to estimate VP. Unless the user enters a boiling point on the data entry screen, MPBPWIN uses the estimated boiling point from the adapted Stein and Brown method.
GLP compliance:
no
Type of method:
other: QSAR
Key result
Temp.:
25 °C
Vapour pressure:
0.006 Pa
Remarks on result:
other: QSAR estimation using Antoine Method
Temp.:
25 °C
Vapour pressure:
0.012 Pa
Remarks on result:
other: QSAR estimation using Modified Grain Method
Temp.:
25 °C
Vapour pressure:
0.022 Pa
Remarks on result:
other: QSAR estimation using Mackay method
Conclusions:
The vapour pressure of rhodium acetate is estimated to be 0.00632 Pa at 25 °C.
Executive summary:

The vapour pressure of rhodium acetate was estimated using a QSAR model (MPBPWIN v1.43in EPISuite v4.10, US EPA 2010). Vapour pressure is not considered to be relevant for inorganic substances, but as this substance has an organic component vapour pressure has been estimated using a QSAR model and this is considered to be sufficient for evaluation of this endpoint.

The vapour pressure of rhodium acetate is estimated to be 0.00632 pa at 25°C using the Antoine method, 0.0117 Pa using the Modified Grain method and 0.0218 Pa using the Mackay method. The result based on the Antoine method is used as the key result for this endpoint.

Description of key information

The vapour pressure of rhodium acetate is estimated to be 0.00632 pa at 25 °C.

Key value for chemical safety assessment

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

Additional information

The vapour pressure of rhodium acetate was estimated using a QSAR model (MPBPWIN v1.43in EPISuite v4.10, US EPA 2010). Vapour pressure is not considered to be relevant for inorganic substances, but as this substance has an organic component vapour pressure has been estimated using a QSAR model and this is considered to be sufficient for evaluation of this endpoint.

The vapour pressure of rhodium acetate is estimated to be 0.00632 pa at 25°C using the Antoine method, 0.0117 Pa using the Modified Grain method and 0.0218 Pa using the Mackay method. The result based on the Antoine method is used as the key result for this endpoint.