Oxidizing solids Classification
When oxidizing solid substances not mentioned by name in Table A of Chapter 3.2 are assigned to one of the entries listed in2.2.51.3 on the basis of the test procedure in accordance with the Manual of Tests and Criteria, Part III, sub-section 34.4.1 (test O.1) or alternatively, sub section 34.4.3 (test O.3), the following criteria shall apply:
(a) In the test O.1, a solid substance shall be assigned to Class 5.1 if, in the 4:1 or the 1:1 sample-to-cellulose ratio (by mass) tested, it ignites or burns or exhibits mean burning times equal to orless than that of a 3:7 mixture (by mass) of potassium bromate and cellulose; or
(b) In the test O.3, a solid substance shall be assigned to Class 5.1 if, in the 4:1 or the 1:1 sample-to-cellulose ratio (by mass) tested, it exhibits a mean burning rate equal to or greater than themean burning rate of a 1:2 mixture (by mass) of calcium peroxide and cellulose.
By exception, solid ammonium nitrate based fertilizers shall be classified in accordance with the procedure as set out in the Manual of Tests and Criteria, Part III, Section39.
Assignment of packing groups
Oxidizing solids classified under the various entries in Table A of Chapter 3.2 shall be assigned to packing groups I, II or III on the basis of test procedures of the Manual of Tests and Criteria, Part III, sub-section34.4.1 (test O.1) or sub-section34.4.3 (test O.3), in accordance with the following criteria:
(a)Test O.1:
(i)Packing group I: any substance which, in the 4:1 or 1:1 sample-to-cellulose ratio(bymass) tested, exhibits a mean burning time less than the mean burning time of a3:2mixture, by mass, of potassium bromate and cellulose;
(ii)Packing group II: any substance which, in the 4:1 or 1:1 sample-to-cellulose ratio(bymass) tested, exhibits a mean burning time equal to or less than the mean burningtime of a 2:3mixture (by mass) of potassium bromate and cellulose and the criteria forpacking groupI are not met;
(iii)Packing group III: any substance which, in the 4:1 or 1:1 sample-to-cellulose ratio(bymass) tested, exhibits a mean burning time equal to or less than the mean burningtime of a 3:7mixture (by mass) of potassium bromate andcellulose and the criteria forpacking groups I and II are not met;
(b)Test O.3:
(i)Packing group I: any substance which, in the 4:1 or 1:1 sample-to-cellulose ratio (bymass) tested, exhibits a mean burning rate greater than the mean burning rate of a 3:1mixture (by mass) of calcium peroxide and cellulose;
(ii)Packing group II: any substance which, in the 4:1 or 1:1 sample-to-cellulose ratio (bymass) tested, exhibits a mean burning rate equal to or greater than the mean burning rateof a 1:1 mixture (by mass) of calcium peroxide and cellulose, and the criteria forpacking group I are not met;
(iii)Packing group III: any substance which, in the 4:1 or 1:1 sample-to-cellulose ratio (bymass) tested, exhibits a mean burning rate equal to or greater than the mean burning rateof a 1:2 mixture (by mass) of calcium peroxide and cellulose, and the criteria forpacking groups I and II are not met.
Oxidizing liquids Classification
When oxidizing liquid substances not mentioned by name in Table A of Chapter 3.2 are assigned to one of the entries listed in sub-section 2.2.51.3 on the basis of the test procedure in accordance with the Manual of Tests and Criteria, Part III, sub-section 34.4.2, the following criteria shall apply:
A liquid substance shall be assigned to Class 5.1 if, in the 1:1 mixture, by mass, of substance and cellulose tested, it exhibits a pressure rise of 2070 kPa gauge or more and a mean pressure rise time equal to or less than the mean pressure rise time of a 1:1 mixture, by mass, of 65% aqueous nitric acid
and cellulose.
Assignment of packing groups
Oxidizing liquids classified under the various entries in Table A of Chapter 3.2 shall be assigned to packing groups I, II or III on the basis of test procedures of the Manual of Tests and Criteria, Part III, section 34.4.2, in accordance with the following criteria:
(a) Packing group I: any substance which, in the 1:1 mixture, by mass, of substance and cellulose tested, spontaneously ignites; or the mean pressure rise time of a 1:1 mixture, by mass, of substance and cellulose is less than that of a 1:1 mixture, by mass, of 50% perchloric acid and cellulose;
(b) Packing group II: any substance which, in the 1:1 mixture, by mass, of substance and cellulose tested, exhibits a mean pressure rise time less than or equal to the mean pressure rise time of a 1:1 mixture, by mass, of 40% aqueous sodium chlorate solution and cellulose; and the criteria
for packing group I are not met;
(c) Packing group III: any substance which, in the 1:1 mixture, by mass, of substance and cellulose tested, exhibits a mean pressure rise time less than or equal to the mean pressure rise time of a 1:1 mixture, by mass, of 65% aqueous nitric acid and cellulose; and the criteria for packing groups I and II are not met.
Substances not accepted for carriage
The chemically unstable substances of Class 5.1 shall not be accepted for carriage unless the necessary steps have been taken to prevent their dangerous decomposition or polymerization during carriage. To this end it shall in particular be ensured that receptacles and tanks do not contain any material liable to promote these reactions.
The following substances and mixtures shall not be accepted for carriage:
- oxidizing solids, self-heating, assigned to UN No. 3100, oxidizing solids, water-reactive, assigned to UN No. 3121 and oxidizing solids, flammable, assigned to UN No. 3137, unless they meet the requirements for Class 1 (see also 2.1.3.7);
- hydrogen peroxide, not stabilized or hydrogen peroxide, aqueous solutions, not stabilized containing more than 60% hydrogen peroxide;
- tetranitromethane not free from combustible impurities;
- perchloric acid solutions containing more than 72% (mass) acid, or mixtures of perchloric acid with any liquid other than water;
- chloric acid solution containing more than 10% chloric acid or mixtures of chloric acid with any liquid other than water;
- halogenated fluor compounds other than UN Nos. 1745 BROMINE PENTAFLUORIDE; 1746 BROMINE TRIFLUORIDE and 2495 IODINE PENTAFLUORIDE of Class 5.1 as well as UN Nos. 1749 CHLORINE TRIFLUORIDE and 2548 CHLORINE PENTAFLUORIDE of Class 2;
- ammonium chlorate and its aqueous solutions and mixtures of a chlorate with an ammonium salt;
- ammonium chlorite and its aqueous solutions and mixtures of a chlorite with an ammonium salt;
- mixtures of a hypochlorite with an ammonium salt;
- ammonium bromate and its aqueous solutions and mixtures of a bromate with an ammonium salt;
- ammonium permanganate and its aqueous solutions and mixtures of a permanganate with an ammonium salt;
- ammonium nitrate containing more than 0.2% combustible substances (including any organic substance calculated as carbon) unless it is a constituent of a substance or article of Class 1;
-ammonium nitrate based fertilizers with compositions that lead to exit boxes 4, 6, 8, 15, 31, or33 of the flowchart of paragraph 39.5.1 of the Manual of Tests and Criteria, Part III, Section39, unless they have been assigned a suitable UN number in Class 1;
-ammonium nitrate based fertilizers with compositions that lead to exit boxes 20, 23 or 39 of theflowchart of paragraph 39.5.1 of the Manual of Tests and Criteria,Part III, Section 39, unlessthey have been assigned a suitable UN number in Class 1 or, provided that the suitability forcarriage has been demonstrated and that this has been approved by the competent authority, inClass 5.1 other than UN No. 2067;
NOTE:The term “competent authority” means the competent authority of the country oforigin. If the country of origin is not a Contracting Party to ADR, the classification andconditions of carriage shall be recognized by the competent authority of the firstcountryContracting Party to ADR reached by the consignment.
-ammonium nitrite and its aqueous solutions and mixtures of an inorganic nitrite with anammonium salt;
-mixtures of potassium nitrate, sodium nitrite and an ammonium salt.
List of collective entries
Class 5.2 Organic peroxides
Criteria
The heading of Class 5.2 covers organic peroxides and formulations of organic peroxides.
The substances of Class 5.2 are subdivided as follows:
P1 Organic peroxides, not requiring temperature control;
P2 Organic peroxides, requiring temperature control.
Definition
Organic peroxidesare organic substances which contain the bivalent -O-O- structure and may be considered derivatives of hydrogen peroxide, where one or both of the hydrogen atoms have been replaced by organic radicals.
Properties
Organic peroxides are liable to exothermic decomposition at normal or elevated temperatures. The decomposition can be initiated by heat, contact with impurities (e.g. acids, heavy-metal compounds, amines), friction or impact. The rate of decomposition increases with temperature and varies with the organic peroxide formulation. Decomposition may resultin the evolution of harmful, or flammable, gases or vapours. For certain organic peroxides the temperature shall be controlled during carriage. Some organic peroxides may decompose explosively, particularly if confined. This characteristic may be modifiedby the addition of diluents or by the use of appropriate packagings. Many organic peroxides burn vigorously. Contact of organic peroxides with the eyes is to be avoided. Some organic peroxides will cause serious injury to the cornea, even after brief contact, or will be corrosive to the skin.
NOTE:Test methods for determining the flammability of organic peroxides are set out in the Manual of Tests and Criteria, Part III, sub-section 32.4. Because organic peroxides may react vigorously when heated, it is recommended to determine their flash-point using small sample sizes such as described in ISO 3679:1983.