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Vapour pressure

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Endpoint:
vapour pressure
Type of information:
calculation (if not (Q)SAR)
Remarks:
estimated by calculation
Adequacy of study:
weight of evidence
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
results derived from a valid (Q)SAR model and falling into its applicability domain, with limited documentation / justification
Qualifier:
no guideline required
Principles of method if other than guideline:
Software V11.02
GLP compliance:
no
Type of method:
other: calculation
Temp.:
25 °C
Vapour pressure:
0 Torr
Temp.:
25 °C
Vapour pressure:
0 Pa
Remarks on result:
other: calculated from 0.000000012 Torr
Conclusions:
The calculated vapour pressure (ACD labs) of the pure Bis(2,4-dichlorobenzoyl) peroxide is 0.0000016 Pa at 25 °C.
Executive summary:

The calculated vapour pressure (ACD labs) of the pure Bis(2,4-dichlorobenzoyl) peroxide is 0.0000016 Pa at 25 °C.

Endpoint:
vapour pressure
Type of information:
calculation (if not (Q)SAR)
Remarks:
estimated by calculation
Adequacy of study:
supporting study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
results derived from a valid (Q)SAR model and falling into its applicability domain, with limited documentation / justification
Principles of method if other than guideline:
calculation
Type of method:
other: calculation
Temp.:
25 °C
Vapour pressure:
0 Pa
Remarks on result:
other: Mean VP of Antoine & Grain methods
Conclusions:
The calculated vapour pressure (EpiSuite) of the pure Bis(2,4-dichlorobenzoyl) peroxide is 0.000141 Pa at 25 °C.
Executive summary:

The calculated vapour pressure (EpiSuite) of the pure Bis(2,4-dichlorobenzoyl) peroxide is 0.000141 Pa at 25 °C.

Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
supporting study
Study period:
May 2011
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: see 'Remark'
Remarks:
Experimental determination is difficult, because the substance is hazardous (explosive, unstable) in its pure state. Therefore, calculations (EpiSuite and ACD labs) are supported by read across with a similar substance, dibenzoylperoxide (CAS# 94-36-0).
Justification for type of information:
See "Any other information on materials and methods" below
Qualifier:
no guideline followed
Principles of method if other than guideline:
calculation
GLP compliance:
no
Type of method:
other: calculation
Temp.:
25 °C
Vapour pressure:
< 0.009 Pa

Discussion

Based on read across with dibenzoylperoxide it can be concluded that the vapour pressure of bis(2,4-dichlorobenzoyl) peroxide is < 0.009 Pa at 25°C as worst case. This conclusion is supported by the EPISUITE calculation for this substance which resulted in a value of 0.000141 Pa at 25°C.

Conclusions:
The vapour pressure of bis(2,4-dichlorobenzoyl) peroxide is < 0.009 Pa at 25°C.
Executive summary:

The vapour pressure of bis(2,4-dichlorobenzoyl) peroxide (CAS# 133-14-2) is determined by read across with dibenzoylperoxide (CAS# 94-36-0) and this is supported by calculation with EPISUITE. The worst case vapour pressure of bis(2,4-dichlorobenzoyl) peroxide is < 0.009 Pa at 25°C.

Description of key information

The worst case vapour pressure of bis(2,4-dichlorobenzoyl) peroxide  is < 0.009 Pa at 25°C (read across from 94-36-0).  Calculated vapour pressures are 0.0000016 Pa at 25 oC (ACD labs) and 0.000141 Pa at 25 oC (EpiSuite)..

Key value for chemical safety assessment

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

Additional information

Based on read across with dibenzoylperoxide it can be concluded that the worst case vapour pressure of bis(2,4-dichlorobenzoyl) peroxide is < 0.009 Pa at 25°C. This conclusion as worst case is supported by the EPISUITE calculation for this substance which resulted in a value of 0.000141 Pa at 25°C

and the ACD labs calculated vapour pressure of 0.0000016 Pa at 25°C by ACD labs.