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Reference
Endpoint:
flammable solids
Type of information:
calculation (if not (Q)SAR)
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
accepted calculation method
Remarks:
Predicted based on the standard reaction enthalpy of the combustion reaction of TCA, acceptable with restrictions.
Justification for type of information:
A calculation approach has been used in order to determine the standard reaction enthalpy of the combustion reaction of TCA.
Qualifier:
no guideline available
Principles of method if other than guideline:
To investigate the flammability potential of tetrachloroauric acid, the standard reaction enthalpy of the combustion reaction of tetrachloroauric acid was calculated.
GLP compliance:
no
Test procedure:
other: Calculation of standard enthalpy of the combustion reaction
Remarks on result:
other: See 'Remark'
Remarks:
Standard enthalpy of the combustion reaction of tetrachloroauric acid is +3726.2 kJ/mol.

From the calculated standard enthalpy reaction, it is shown that the combustion of tetrachloroauric acid is a strong endothermic reaction (+3726.2 kJ/mol). Based on thermodynamical principles, the combustion reaction of tetrachloroauric acid is not possible.

Interpretation of results:
not classified based on GHS criteria
Conclusions:
Based on the calculated standard enthalpy reaction of +3726.2 kJ/mol, it can be concluded that the combustion of tetrachloroauric acid is a strong endothermic reaction. Based on thermodynamical principles, the combustion reaction of tetrachloroauric acid is not possible.
Executive summary:

To investigate the flammability potential of tetrachloroauric acid (CAS 16903-35-8), the standard reaction enthalpy of the combustion reaction of tetrachloroauric acid was calculated.

From the calculated standard enthalpy reaction, it is shown that the combustion of tetrachloroauric acid is a strong endothermic reaction (+3726.2 kJ/mol). Based on thermodynamical principles, the combustion reaction of tetrachloroauric acid is not possible.

A calculation approach has been used in order to predict the flammability potential of the test item. The standard reaction enthalpy of the combustion reaction of tetrachloroauric acid was calculated using a general standard reaction enthalpy equation and standard formation enthalpy of reagents and products taken from peer reviewed handbooks. The data presented here are acceptable as they are based on a reliable calculation method and therefore can be considered suitable for use as a key study for this endpoint.

Description of key information

Standard enthalpy of the combustion reaction of tetrachloroauric acid was calculated to be +3726.2 kJ/mol. It was concluded that based on thermodynamical principles, the combustion reaction of tetrachloroauric acid is not possible.

Key value for chemical safety assessment

Flammability:
not classified

Additional information

The flammability potential of tetrachloroauric acid was predicted based on the standard reaction enthalpy of the combustion reaction of tetrachloroauric acid (PMRC 2017).

 

From the calculated standard enthalpy reaction, it was shown that the combustion of tetrachloroauric acid is a strong endothermic reaction (+3726.2 kJ/mol) and therefore the combustion reaction of tetrachloroauric acid is not possible.

 

This information has been supplied in the form of a statement letter outlining the calculation approach. The standard reaction enthalpy of the combustion reaction of tetrachloroauric acid was calculated using a general standard reaction enthalpy equation and standard formation enthalpy of reagents and products taken from peer reviewed handbooks. It is considered reliable with restrictions and is suitable for use as key data.

Justification for classification or non-classification

Tetrachloroauric acid is not classified as a readily combustible solid under Division 4.1 as based on the calculated standard enthalpy of the combustion reaction of tetrachloroauric acid and thermodynamical principles, it can be predicted that the combustion reaction of tetrachloroauric acid is not possible.