Dangerous Goods by Road
In accordance with the provisions of 1.1.3.6, the requirements of 1.10.1, 1.10.2, 1.10.3 and 8.1.2.1 (d)
do not apply when the quantities carried in packages on a transport unit do not exceed those referred
to in 1.1.3.6.3, except for UN Nos. 0029, 0030, 0059, 0065, 0073, 0104, 0237, 0255, 0267, 0288,
0289, 0290, 0360, 0361, 0364, 0365, 0366, 0439, 0440, 0441, 0455, 0456 and 0500 and except for
UN Nos. 2910 and 2911 if the activity level exceeds the A2 value (see first indent of 1.1.3.6.2). In
addition, the requirements of 1.10.1, 1.10.2, 1.10.3 and 8.1.2.1 (d) do not apply when the quantities
carried in tanks or in bulk on a transport unit do not exceed those referred to in 1.1.3.6.3. In addition
the provisions of this Chapter do not apply to the carriage of UN No. 2912 RADIOACTIVE
MATERIAL, LOW SPECIFIC ACTIVITY (LSA-I) and UN No. 2913 RADIOACTIVE MATERIAL,
SURFACE CONTAMINATED OBJECTS (SCO-I).
For radioactive material, the provisions of this Chapter are deemed to be complied with when the
provisions of the Convention on Physical Protection of Nuclear Material1 and the IAEA circular on
"The Physical Protection of Nuclear Material and Nuclear Facilities"2 are applied.
Classification
GENERAL PROVISIONS
Introduction
The classes of dangerous goods according to ADR are the following:
Class 1 Explosive substances and articles
Class 2 Gases
Class 3 Flammable liquids
Class 4.1 Flammable solids, self-reactive substances, polymerizing substances and solid
desensitized explosives
Class 4.2 Substances liable to spontaneous combustion
Class 4.3 Substances which, in contact with water, emit flammable gases
Class 5.1 Oxidizing substances
Class 5.2 Organic peroxides
Class 6.1 Toxic substances
Class 6.2 Infectious substances
Class 7 Radioactive material
Class 8 Corrosive substances
Class 9 Miscellaneous dangerous substances and articles
Each entry in the different classes has been assigned a UN number. The following types of entries are
used:
A. Single entries for well defined substances or articles including entries for substances covering
several isomers, e.g.:
UN No. 1090 ACETONE
UN No. 1104 AMYL ACETATES
UN No. 1194 ETHYL NITRITE SOLUTION
B. Generic entries for a well defined group of substances or articles, which are not n.o.s. entries,
e.g.:
UN No. 1133 ADHESIVES
UN No. 1266 PERFUMERY PRODUCTS
UN No. 2757 CARBAMATE PESTICIDE, SOLID, TOXIC
UN No. 3101 ORGANIC PEROXIDE TYPE B, LIQUID
C. Specific n.o.s. entries covering a group of substances or articles of a particular chemical or
technical nature, not otherwise specified, e.g.:
UN No. 1477 NITRATES, INORGANIC, N.O.S.
UN No. 1987 ALCOHOLS, N.O.S.
D. General n.o.s. entries covering a group of substances or articles having one or more dangerous
properties, not otherwise specified, e.g.:
UN No. 1325 FLAMMABLE SOLID, ORGANIC, N.O.S.
UN No. 1993 FLAMMABLE LIQUID, N.O.S.
The entries defined under B., C. and D. are defined as collective entries.
For packing purposes, substances other than those of Classes 1, 2, 5.2, 6.2 and 7, and other than selfreactive
substances of Class 4.1 are assigned to packing groups in accordance with the degree of
danger they present:
Packing group I: Substances presenting high danger;
Packing group II: Substances presenting medium danger;
Packing group III: Substances presenting low danger.
The packing group(s) to which a substance is assigned is (are) indicated in Table A of Chapter 3.2.
Articles are not assigned to packing groups. For packing purposes any requirement for a specific
packaging performance level is set out in the applicable packing instruction.
Principles of classification
The dangerous goods covered by the heading of a class are defined on the basis of their properties
according to sub-section 2.2.x.1 of the relevant class. Assignment of dangerous goods to a class and a
packing group is made according to the criteria mentioned in the same sub-section 2.2.x.1.
Assignment of one or several subsidiary risk(s) to a dangerous substance or article is made according
to the criteria of the class or classes corresponding to those risks, as mentioned in the appropriate subsection(
s) 2.2.x.1.
All dangerous goods entries are listed in Table A of Chapter 3.2 in the numerical order of their UN
Number. This table contains relevant information on the goods listed, such as name, class, packing
group(s), label(s) to be affixed, packing and carriage provisions1. The substances listed by name in
column (2) of Table A of Chapter 3.2 shall be carried according to their classification in Table A or
under the conditions specified in 2.1.2.8.
A substance may contain technical impurities (for example those deriving from the production
process) or additives for stability or other purposes that do not affect their classification. However, a
substance mentioned by name, i.e. listed as a single entry in Table A of Chapter 3.2, containing
technical impurities or additives for stability or other purposes affecting its classification shall be
considered a solution or mixture (see 2.1.3.3).
Dangerous goods which are listed or defined in sub-section 2.2.x.2 of each class are not to be accepted
for carriage.
Goods not mentioned by name, i.e. goods not listed as single entries in Table A of Chapter 3.2 and not
listed or defined in one of the above-mentioned sub-sections 2.2.x.2 shall be assigned to the relevant
class in accordance with the procedure of section 2.1.3. In addition, the subsidiary risk (if any) and the
packing group (if any) shall be determined. Once the class, subsidiary risk (if any) and packing group
(if any) have been established the relevant UN number shall be determined. The decision trees in subsections
2.2.x.3 (list of collective entries) at the end of each class indicate the relevant parameters for
selecting the relevant collective entry (UN number). In all cases the most specific collective entry
covering the properties of the substance or article shall be selected, according to the hierarchy
indicated in 2.1.1.2 by the letters B, C and D respectively. If the substance or article cannot be
classified under entries of type B or C according to 2.1.1.2, then, and only then shall it be classified
under an entry of type D.
On the basis of the test procedures of Chapter 2.3 and the criteria set out in sub-sections 2.2.x.1 of
classes when it is so specified, it may be determined that a substance, solution or mixture of a certain
class, mentioned by name in Table A of Chapter 3.2, does not meet the criteria of that class. In such a
case, the substance, solution or mixture is deemed not to belong to that class.