2.14. Oxidising solids
2.14. Oxidising solids
Oxidising solid means a solid substance or mixture which, while in itself is not necessarily combustible, may, generally by yielding oxygen, cause, or contribute to, the combustion of other material.
2.14.2. Classification criteria
2.14.2.1.
►M12
An oxidising solid shall be classified in one of the three categories for this class using test O.1 in Part III, sub-section 34.4.1 or test O.3 in Part III, sub-section 34.4 3 of the UN RTDG, Manual of Tests and Criteria in accordance with Table 2.14.1: ◄
2.14.2.1. ►M12 An oxidising solid shall be classified in one of the three categories for this class using test O.1 in Part III, sub-section 34.4.1 or test O.3 in Part III, sub-section 34.4 3 of the UN RTDG, Manual of Tests and Criteria in accordance with Table 2.14.1: ◄
Table 2.14.1
Criteria for oxidising solids
|
Category |
Criteria using test O.1 |
Criteria using test O.3 |
|
1 |
Any substance or mixture which, in the 4:1 or 1:1 sample-to-cellulose ratio (by mass) tested, exhibits a mean burning time less than the mean burning time of a 3:2 mixture, (by mass), of potassium bromate and cellulose. |
Any substance or mixture which, in the 4:1 or 1:1 sample-to-cellulose ratio (by mass) tested, exhibits a mean burning rate greater than the mean burning rate of a 3:1 mixture (by mass) of calcium peroxide and cellulose. |
|
2 |
Any substance or mixture which, in the 4:1 or 1:1 sample-to-cellulose ratio (by mass) tested, exhibits a mean burning time equal to or less than the mean burning time of a 2:3 mixture (by mass) of potassium bromate and cellulose and the criteria for Category 1 are not met. |
Any substance or mixture which, in the 4:1 or 1:1 sample-to-cellulose ratio (by mass) tested, exhibits a mean burning rate equal to or greater than the mean burning rate of a 1:1 mixture (by mass) of calcium peroxide and cellulose and the criteria for Category 1 are not met. |
|
3 |
Any substance or mixture which, in the 4:1 or 1:1 sample-to-cellulose ratio (by mass) tested, exhibits a mean burning time equal to or less than the mean burning time of a 3:7 mixture (by mass) of potassium bromate and cellulose and the criteria for Categories 1 and 2 are not met. |
Any substance or mixture which, in the 4:1 or 1:1 sample-to-cellulose ratio (by mass) tested, exhibits a mean burning rate equal to or greater than the mean burning rate of a 1:2 mixture (by mass) of calcium peroxide and cellulose and the criteria for Categories 1 and 2 are not met. |
Note 1
Some oxidising solids also present explosion hazards under certain conditions (when stored in large quantities). Some types of ammonium nitrate may give rise to an explosion hazard under extreme conditions and the ‘Resistance to detonation test’ ►M12 (IMSBC Code (International Maritime Solid Bulk Cargoes Code, IMO), Appendix 2, Section 5) ◄ can be used to assess this hazard. Appropriate information shall be made in the SDS.
Note 2
The test shall be performed on the substance or mixture in its physical form as presented. If, for example, for the purposes of supply or transport, the same chemical is to be presented in a physical form different from that which was tested and which is considered likely to materially alter its performance in a classification test, the substance shall also be tested in the new form.
2.14.3. Hazard Communication
Label elements shall be used for substances or mixtures meeting the criteria for classification in this hazard class in accordance with Table 2.14.2.
Table 2.14.2
Label elements for oxidising solids
|
|
Category 1 |
Category 2 |
Category 3 |
|
GHS Pictograms |
|
|
|
|
Signal Word |
Danger |
Danger |
Warning |
|
Hazard Statement |
H271: May cause fire or explosion; strong oxidiser |
H272: May intensify fire; oxidiser |
H272: May intensify fire; oxidiser |
|
Precautionary Statement Prevention |
P210 P220 P280 P283 |
P210 P220 P280 |
P210 P220 P280 |
|
Precautionary Statement Response |
P306 + P360 P371 + P380 + P375 P370 + P378 |
P370 + P378 |
P370 + P378 |
|
Precautionary Statement Storage |
P420 |
|
|
|
Precautionary Statement Disposal |
P501 |
P501 |
P501 |
2.14.4. Additional Classification Considerations
2.14.4.1. For organic substances or mixtures the classification procedure for this class shall not apply if:
(a)
the substance or mixture does not contain oxygen, fluorine or chlorine; or
(b)
the substance or mixture contains oxygen, fluorine or chlorine and these elements are chemically bonded only to carbon or hydrogen.
2.14.4.2. For inorganic substances or mixtures the classification procedure for this class shall not apply if they do not contain oxygen or halogen atoms.
2.14.4.3. In the event of divergence between test results and known experience in the handling and use of substances or mixtures which shows them to be oxidising, judgments based on known experience shall take precedence over test results.
2.14.4.1. For organic substances or mixtures the classification procedure for this class shall not apply if:
the substance or mixture does not contain oxygen, fluorine or chlorine; or
the substance or mixture contains oxygen, fluorine or chlorine and these elements are chemically bonded only to carbon or hydrogen.
2.14.4.2. For inorganic substances or mixtures the classification procedure for this class shall not apply if they do not contain oxygen or halogen atoms.
2.14.4.3. In the event of divergence between test results and known experience in the handling and use of substances or mixtures which shows them to be oxidising, judgments based on known experience shall take precedence over test results.