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Vapour pressure

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Reference
Endpoint:
vapour pressure
Type of information:
read-across from supporting substance (structural analogue or surrogate)
Adequacy of study:
key study
Study period:
27/02/2012-23/05/2012
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Justification for type of information:
Read across from BROMINATED EPOXY HAVING EPOXY EQUIVALENT OF 400 gr/eq is justified by:
1.Both materials have the same backbone containing CMO-TBBPA-CMO.
2.Both materials have the same components distribution.
3.The difference between the two materials is the tribromophenol endcap.
An analytical report for BROMINATED EPOXY HAVING EPOXY EQUIVALENT OF 400 gr/eq is provided as attached justification. the analytical results can be compared to the composition of F-3014 (section 1.2).
Reason / purpose:
read-across source
Qualifier:
according to
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Qualifier:
according to
Guideline:
EPA OPPTS 830.7950 (Vapor Pressure)
Principles of method if other than guideline:
/
GLP compliance:
yes
Type of method:
spinning rotor
Key result
Test no.:
#1
Temp.:
20 °C
Vapour pressure:
< 0 Pa
Remarks on result:
not determinable

The offset value (mean DCR) was 3.0562 x 10-7 s-1 at 20 ± 1°C.

This value was based on the average deceleration rate measured with an empty sample chamber.

The mean measured background vapor pressure of the system by the SRG method was 2.22 x 10-5 Pa at 20 ± 1°C.

The mean measured vapor pressure of the reference substance, hexachlorobenzene, by the SRG method was 1.37 x 10-3 Pa at 20 ± 1°C. The vapor pressure was consistent with published values.

The system offset pressure using a weighted average molecular weight of 803 g/mol was 1.4659 x 10-4 Pa at 20 ± 1°C. The mean measured vapor pressure of Brominated Epoxy, using a weighted average molecular weight of 803 g/mol, by the SRG was 1.43 x 10-5 Pa at 20 ± 1°C, which was below the recommended reporting range of the spinning rotor gauge method.

Conclusions:
The mean vapor pressure for Brominated Epoxy at 20 ± 1°C was less than the recommended reporting range of the spinning rotor gauge method (1 x 10-4 Pa).
F-3014 compare to BROMINATED EPOXY HAVING EPOXY EQUIVALENT OF 400 gr/eq has tribromophenol as an endcap. This endcap increase the molecular weight and cause the material to become solid compare to BROMINATED EPOXY HAVING EPOXY EQUIVALENT OF 400 gr/eq which is wax like. Thus, the VP for F-3014 is expected to me even lower than the measured value for the BROMINATED EPOXY HAVING EPOXY EQUIVALENT OF 400 gr/eq.
Executive summary:

The mean vapor pressure for Brominated Epoxy at 20 ± 1°C was less than the recommended range of the spinning rotor gauge method (1 x 10-4 Pa). F-3014 compare to BROMINATED EPOXY HAVING EPOXY EQUIVALENT OF 400 gr/eq has tribromophenol as an endcap. This endcap increase the molecular weight and cause the material to become solid compare to BROMINATED EPOXY HAVING EPOXY EQUIVALENT OF 400 gr/eq which is wax like. Thus, the VP for F-3014 is expected to me even lower than the measured value for the BROMINATED EPOXY HAVING EPOXY EQUIVALENT OF 400 gr/eq.

Description of key information

F-3014 compare to BROMINATED EPOXY HAVING EPOXY EQUIVALENT OF 400 gr/eq has tribromophenol as an endcap. This endcap increase the molecular weight and cause the material to become solid compare to BROMINATED EPOXY HAVING EPOXY EQUIVALENT OF 400 gr/eq which is wax like. Thus, the VP of F-3014 is expected to me even lower than the measured value for the BROMINATED EPOXY HAVING EPOXY EQUIVALENT OF 400 gr/eq. This assumption is further supported by QSAR assessment for the smallest component. The assessment predict a VP value in the order of magnitude less than 10-20Pa.

Key value for chemical safety assessment

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

Additional information