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Physical & Chemical properties

Oxidising properties

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Endpoint:
oxidising solids
Type of information:
migrated information: read-across from supporting substance (structural analogue or surrogate)
Adequacy of study:
weight of evidence
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: GLP Compliant, guideline study, available as unpublished report, acceptable with restrictions
Qualifier:
equivalent or similar to
Guideline:
UN Manual of Tests and Criteria: Test O.1 (Test for oxidizing solids)
Deviations:
yes
Remarks:
electrical resistance of ignition wire used was 3.9Ω/m, deviation from the electrical resistance of 6.0 ± 0.5 Ω/m, However the material, length and diameter of th ewire met the method specifications. In addition, the appropriate combination of curren
GLP compliance:
yes (incl. certificate)
Contact with:
powdered cellulose
Duration of test (contact time):
3 min
Sample tested:
1:1 sample-to-cellulose ratio
Parameter:
burning rate
Remarks on result:
mixture does not ignite and burn
Sample tested:
4:1 sample-to-cellulose ratio
Parameter:
burning rate
Remarks on result:
mixture does not ignite and burn
Results
3:7 (by mass) cellulose and potassium bromate reference mixture
Test Number Burning Time (seconds) Observations
1 91 Mixture burned with an orange and greenish blue flame with some spluttering
2 138 Mixture burned with an orange and blue flame with spluttering
3 123 Mixture burned with an orange and blue flame with spluttering
4 112 Mixture burned with an orange and blue flame with spluttering
5 114 Mixture burned with an orange and blue flame with spluttering
1:1 (by mass) test item and cellulose mixture
1  - Grey fumes emitted: no ignition. Some charring of the mixture
2  - Grey fumes emitted: no ignition. Some charring of the mixture
3  - Grey fumes emitted: no ignition. Some charring of the mixture
4  - Grey fumes emitted: no ignition. Some charring of the mixture
5  - Grey fumes emitted: no ignition. Some charring of the mixture
4:1 (by mass) test item and cellulose mixture 
1  - Mixture appears to be boiling and blackening. Liquefying observed. No ignition
2  - Mixture appears to be boiling, black liquid. Grey fumes. No ignition
3  - Mixture appears to be boiling, black liquid. Grey fumes. No ignition
4  - Mixture appears to be charred and melted. Grey fumes. No ignition
5  - Mixture appears to be boiling, black liquid. Grey fumes. No ignition

Test item was fine powder but did contain some larger granules. Whole of test item was ground to a fine powder

Interpretation of results:
GHS criteria not met
Conclusions:
Hexachloroplatinic acid has been determined not be a Division 5.1 substance for oxidising properties, as both the 4:1 and 1:1 test item to cellulose test mixtures failed to ignite.
Executive summary:

This is a GLP compliant study following UN method O.1 and is considered suitable for use as the key study for this endpoint.

Hexachloroplatinic acid has been determined not be a Division 5.1 substance for oxidising properties, as both the 4:1 and 1:1 test item to cellulose test mixtures failed to ignite.

Endpoint:
oxidising solids
Type of information:
migrated information: read-across from supporting substance (structural analogue or surrogate)
Adequacy of study:
weight of evidence
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: GLP compliant, guideline study, available as unpublished report, acceptable without restrictions
Qualifier:
equivalent or similar to
Guideline:
UN Manual of Tests and Criteria: Test O.1 (Test for oxidizing solids)
Deviations:
yes
Remarks:
Electrical resistance of ignition wire used was 3.9Ω/m.
GLP compliance:
yes (incl. certificate)
Contact with:
powdered cellulose
Duration of test (contact time):
3 min
Sample tested:
1:1 sample-to-cellulose ratio
Parameter:
burning rate
Remarks on result:
mixture does not ignite and burn
Sample tested:
4:1 sample-to-cellulose ratio
Parameter:
burning rate
Remarks on result:
mixture does not ignite and burn
Results of 3:7 (by mass) reference mixture of potassium bromate and cellulose  
Test Number Burning Time (s) Observations
1 147 An orange/blue spluttering flame which left dark grey ash
2 139 An orange/blue spluttering flame which left dark grey ash
3 116 An orange/blue spluttering flame which left dark grey ash
4 133 An orange/blue spluttering flame which left dark grey ash
5 145 An orange/blue spluttering flame which left dark grey ash
Results of 4:1 (by mass) test item and cellulose mixture 
Test Number Burning Time (s) Observations
1  - Pale grey smoke, no sign of ignition during the 3 minutes the power was applied
2  - Dark grey smoke, no sign of ignition during the 3 minutes the power was applied
3  - Dark grey smoke, no sign of ignition during the 3 minutes the power was applied
4  - Dark grey smoke, no sign of ignition during the 3 minutes the power was applied
5  - Dark grey smoke, no sign of ignition during the 3 minutes the power was applied
Results of 1:1 (by mass) test item and cellulose mixture 
1  - Pale grey smoke, the pile was slightly charred
2  - Pale grey smoke, the pile was slightly charred
3  - Pale grey smoke, the pile was slightly charred
4  - Pale grey smoke, the pile was slightly charred
5  - Pale grey smoke, the pile was slightly charred

The 4:1 and 1:1 test item:cellulose mixtures did not ignite and burn during the 3 minutes that the power was applied. This indicates that the test item is not an oxidising solid.

Authors state that the material, length and diameter of wire met method specifications and the appropriate combination of current and voltage was used. therefore as the physical parameters of the wire and the power dissipation met the method specifications, the deviation from the electrical resistance of the wire had no effect on the test.

Interpretation of results:
GHS criteria not met
Conclusions:
Tetraammonium decachloro-mu-oxodiruthenate (4-) is not classified as an oxidising solid in accordance with Regulation (EC) No 1272/2008 of 16 December 2008 on Classification, Labelling and Packaging of Substances and Mixtures as the 4:1 and 1:1 test item:cellulose mixtures did not ignite and burn during the 3 minutes that the power was applied.
Executive summary:

This is a GLP compliant study following UN method O.1, which is considered suitable for use for this endpoint.

Tetraammonium decachloro-mu-oxodiruthenate (4-) is not classified as an oxidising solid in accordance with Regulation (EC) No 1272/2008 of 16 December 2008 on Classification, Labelling and Packaging of Substances and Mixtures as the 4:1 and 1:1 test item:cellulose mixtures did not ignite and burn during the 3 minutes that the power was applied.

Description of key information

On the basis of read-across from other substances with co-ordinated chloride, in the 4 + oxidation state (tetraammonium decachloro-mu-oxodiruthenate and hexachloroplatinic acid), dipotassium hexachloroplatinate is not considered to be oxidising. 

Key value for chemical safety assessment

Oxidising properties:
non oxidising

Additional information

The oxidising properties of dipotassium hexachloroplatinate are read across from other substances with co-ordinated chloride, in the 4+ oxidation state (tetraammonium decachloro-mu-oxodiruthenate and hexachloroplatinic acid). Neither of these substances are oxidising based on GLP-compliant studies following UN method O.1 (Tremain and Atwal 2011, Walker and White 2011), there is also supplementary evidence that other metal chlorides are also not oxidizing. For example, other Group VIII transition metals such as cobalt (II) chloride, iron (II), iron(III) and nickel(II) chloride. Copper(I) chloride from the adjacent Group IB is also not classified for oxidizing properties. There is therefore no evidence that any transition metal chloride is an oxidant. Supplementary evidence also comes from the non-transition metal chlorides and there is no evidence from two centuries of industrial and academic experience that these substances are oxidants.

 

On the basis of read-across dipotassium hexachloroplatinate is not classified as an oxidising solid.

Justification for classification or non-classification

On the basis of read-across from other substances with co-ordinated chloride in the 4+ oxidation state, dipotassium hexachloroplatinate is not classified as an oxidising solid.