Palladium dinitrate

Auto flammability

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

auto-flammability

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

other: UN Recommendations on the Transport of Danegerous Goods, Manual of Tests and Criteria, Fifth Revised Edition (2009)

Qualifier:

according to guideline

Guideline:

other: Regulation (EC) No 1272/2008 (CLP-/GHS-regulation)

Principles of method if other than guideline:

The full N4 test was not required for this substance as the melting point was considered to be <160°C based on the DSC measurement.

GLP compliance:

no

Key result

Remarks on result:

not measured/tested

Remarks:

The test item has low melting point (< 160 °C) and should not be classified as self-heating because the melting process is endothermic and the substance-air surface is reduced.

The test item has low melting point (< 160 °C) and should not be classified as self-heating because the melting process is endothermic and the substance-air surface is reduced.

Table 1. Differential Scanning Calorimetry - results

Test item	Trial no.	Sample mass (g)	Endothermic peak (melting peak) (oC)
Palladium (II) nitrate hydrate	1	6.31	123
	2	5.17	128

Conclusions:

Palladium (II) nitrate hydrate does not fulfil the criteria of Class 4.2 "Self-heating Substances" of the UN-TDG and the Hazard Class "Self-heating substances and mixtures" of the Regulation (EC) No. 1272/2008 (CLP-/GHS-Regulation).

Executive summary:

Palladium (II) nitrate hydrate was assessed for auto-flammability following the UN Recommendations on the Transport of Dangerous Goods, Manual of Tests and Criteria fifth Edition (2009) and Regulation (EC) No 1272/2008 (CLP-/GHS-regulation).

Differential Scanning Calorimetry was performed to characterise the test item. During the DSC analysis Palladium (II) nitrate hydrate showed endothermic peaks, for example melting peaks. The test item has low melting point (<160 °C) and therefore does not fulfil the criteria of Class 4.2 "Self-heating Substances" of the UN-TDG and the Hazard Class "Self-heating substances and mixtures" of the Regulation (EC) No. 1272/2008 (CLP-/GHS-Regulation) as the melting process is endothermic and the substance-air surface is reduced. The full N4 test was therefore not conducted.

Reference 2

Endpoint:

relative self-ignition temperature (solids)

Data waiving:

study scientifically not necessary / other information available

Justification for data waiving:

the study does not need to be conducted because the substance is a solid having a melting point <= 160°C

Description of key information

Palladium (II) nitrate hydrate does not fulfil the criteria of Class 4.2 "Self-heating Substances" of the UN-TDG and the Hazard Class "Self-heating substances and mixtures" of the Regulation (EC) No. 1272/2008 (CLP-/GHS-Regulation).

Additional information

Palladium (II) nitrate hydrate was assessed for auto-flammability following the UN Recommendations on the Transport of Dangerous Goods, Manual of Tests and Criteria fifth Edition (2009) and Regulation (EC) No 1272/2008 (CLP-/GHS-regulation) (Michael-Schulz 2016).

Differential Scanning Calorimetry was performed to characterise the test item. During the DSC analysis the test item showed endothermic peaks, for example melting peaks. The substance has low melting point (<160°C) and therefore does not fulfil the criteria of Class 4.2 "Self-heating Substances" of the UN-TDG and the Hazard Class "Self-heating substances and mixtures" of the Regulation (EC) No. 1272/2008 (CLP-/GHS-Regulation) as the melting process is endothermic and the substance-air surface is reduced. The full N4 test was therefore not conducted.