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Vapour pressure

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Reference
Endpoint:
vapour pressure
Type of information:
(Q)SAR
Adequacy of study:
key study
Study period:
2021
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
accepted calculation method
Justification for type of information:
QSAR estimation by MPBPVP program, U.S EPA/Syracuse Research, v1.43 (see attached QMRF and QPRF).
Principles of method if other than guideline:
The estimation of the vapour pressure of Sodium bis(trifluoromethylsulfonyl)imide was performed using the model MPBPVP v.1.43 (September 2008). Three estimation methods: Antoine, Modified Grain and Mackay, which – for solids - all rely on input of measured or estimated boiling and melting points, were used to predict vapour pressure. The model database contained no measured values of either parameter for Sodium bis(trifluoromethylsulfonyl)imide and the vapour pressure calculation therefore relied on estimated inputs. When applied to solids, the Modified Grain procedure is preferred over the Antoine method and the Mackay procedure has a relatively narrow range of applicability and is therefore ranked lowest in order of preference.
GLP compliance:
no
Remarks:
Not relevant (calculated endpoint)
Type of method:
other: (Q)SAR calculated endpoint
Temp.:
25 °C
Vapour pressure:
0 Pa
Remarks on result:
other: Modified Grain Method

Table 1: Vapour pressure estimates for Sodium bis(trifluoromethylsulfonyl)imide provided by the MPBPVP model

Vapour pressure (Pa) at 25°C

Value

Estimation method

3.42E-011 Pa

Antoine

6.01E-009 Pa

Modified Grain

1.87E-008 Pa

Mackay

 

All three vapour pressure estimates for Sodium bis(trifluoromethylsulfonyl)imide are very low, compared to standard atmospheric pressure and Sodium bis(trifluoromethylsulfonyl)imide is not likely to volatilise to the atmosphere under standard conditions. The definitive value selected by the model is the estimate of  6.01E-009 Pa provided by the Modified Grain method

Conclusions:
The vapour pressure of Sodium bis(trifluoromethylsulfonyl)imide was estimated to be 6.01 x 10-9 Pa at 25°C.
Executive summary:

The vapour pressure of Sodium bis(trifluoromethylsulfonyl)imide was estimated using MPBPWIN v1.43.

Sodium bis(trifluoromethylsulfonyl)imide has been estimated to have a vapour pressure of 6.01 x 10-9 Pa at 25°C using the Modified Grain Method.


Description of key information

The vapour pressure of Sodium bis(trifluoromethylsulfonyl)imide was estimated using the QSAR model MPBPVP v.1.43 of the US EPA. The value selected by the model is the estimate of  6.01E-009 Pa calculated according to the Modified Grain method.  

Key value for chemical safety assessment

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

Additional information

A QSAR calculation using EPI Suite V4.1, scored as Klimisch 2 was selected as key study. The vapour pressure estimate for Sodium bis(trifluoromethylsulfonyl)imide is very low, compared to standard atmospheric pressure and is therefore not likely to volatilise to the atmosphere.

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