ADR Class 5.1
Oxidizing substances
Class 5.1 substances are substances that release oxygen, causing or promoting the combustion of other substances.
Ranking
Substances and objects of class 5.1 are classified as follows:
- O Oxidizing substances without subsidiary risk
- O1 Liquids
- O2 Solids
- Objects
- OF Solid oxidizing, flammable materials
- OS Solid oxidizing substances, spontaneous ignition
- OW Solid oxidizing substances, which on contact with water release flammable gases.
- TO Toxic oxidizing materials
- OT1 Liquids
- OT2 Solids
- CO Corrosive oxidizing substances
- OC1 liquids
- OC2 Solids
- OTC Toxic, corrosive, oxidizing, toxic materials
Properties of solid oxidizing materials
Spontaneous heating is caused by the contact of oxygen in the air with matter, generating heat that is not dissipated to the outside. This undissipated heat reaches the spontaneous ignition temperature.
When solid oxidizing substances not expressly mentioned are assigned a heading of 2.2.51.3 on the basis of a procedure described in the Manual of Tests and Criteria depending on whether it is test O.1 or O.3, the following criteria shall be applied:
- Class 5.1 solid matter is considered when mixed 4/1 or 1/1 with cellulose ignites or burns, the duration of combustion is comparable to the 3/7 potassium bromate/cellulose mixture, according to test O.1.
- It is considered solid matter of class 5.1 when when mixed 4/1 or 1/1 with cellulose ignites or burns the duration of combustion is comparable to the mixture calcium peroxide cellulose of 1/2, according to test O.3.
These subjects are assigned to packing groups I, II and III.
Solid oxidizing materials classified under different headings of the table in chapter 3.2 are included in I, II, III based on the Manual of Tests and Criteria as follows:
Test O1:
- GE I: any material mixed in 4/1 or 1/1 with cellulose has a lower average burning time as the mixture 3/2 bromate and cellulose.
- GE II: any material mixed in 4/1 or 1/1 with cellulose has a lower average burning time as the mixture 2/3 bromate and cellulose, if it does not meet the criteria of GE II.
O2 test:
- GHG: any material mixed in 4/1 or 1/1 with cellulose has a lower average burning time as the mixture 3/1 calcium peroxide and cellulose.
- GEII: any material mixed in 4/1 or 1/1 with cellulose has a higher average burning time as the mixture 1/1 calcium peroxide and cellulose, otherwise it meets the criteria of I.
- GEIII: any material mixed 4/1 or 1/1 with cellulose has a higher burning rate as the mixture ½ calcium peroxide and cellulose, if it does not also meet criteria I and II.
Properties of oxidizing liquid materials
An oxidizing liquid matter not expressly mentioned in Table A of 3.2 is included under a heading of 2.2.51.3 on the basis of the test procedures in the Manual of Tests and Criteria.
An oxidizing liquid material is assigned to class 5.1 when mixed 1/1 with cellulose has a pressure rise of about 2070 kPa, comparable to a mixture of nitric acid in aqueous solution at 65% with cellulose 1/1.
These subjects are assigned to packing groups I, II and III.
Class 5.1 packing groups
The assignment of packing groups I, II and III:
- Packing group I applies to material which, when mixed with 1/1 cellulose, ignites and produces a high pressure comparable to the mixture of perchloric acid with 50% 1/1 cellulose.
- Packing group II applies to material which when mixed with cellulose 1/1 causes a pressure rise comparable to that of a mixture of sodium chlorate at 40% cellulose 1/1 and which does not meet the criteria of packing group I.
- Packing group III applies to those materials which when mixed with 1/1 cellulose produce a pressure rise similar to the mixture of 65% nitric acid with 1/1 cellulose and do not meet the criteria of I and II.
