If the hazard characteristics of the substance fall within more than one class or group of substances
not listed in 2.1.3.5.3 above, the substance shall be classified in accordance with the same procedure
but the relevant class shall be selected according to the precedence of hazards table in 2.1.3.10.
If the substance to be carried is a waste, with a composition that is not precisely known, its assignment
to a UN number and packing group in accordance with 2.1.3.5.2 may be based on the consignor’s
knowledge of the waste, including all available technical and safety data as requested by safety and
environmental legislation in force2.
In case of doubt, the highest danger level shall be taken.
If however, on the basis of the knowledge of the composition of the waste and the physical and
chemical properties of the identified components, it is possible to demonstrate that the properties of
the waste do not correspond to the properties of the packing group I level, the waste may be classified
by default in the most appropriate n.o.s. entry of packing group II. However, if it is known that the
waste possesses only environmentally hazardous properties, it may be assigned to packing group III
under UN Nos. 3077 or 3082.
This procedure may not be used for wastes containing substances mentioned in 2.1.3.5.3, substances
of Class 4.3, substances of the case mentioned in 2.1.3.7 or substances which are not accepted for
carriage in accordance with 2.2.x.2.
The most specific applicable collective entry (see 2.1.2.5) shall always be used, i.e. a general n.o.s.
entry shall only be used if a generic entry or a specific n.o.s. entry cannot be used.
Solutions and mixtures of oxidizing substances or substances with an oxidizing subsidiary risk may
have explosive properties. In such a case they are not to be accepted for carriage unless they meet the
requirements for Class 1.
Substances of classes 1 to 6.2, 8 and 9, other than those assigned to UN Nos. 3077 and 3082, meeting
the criteria of 2.2.9.1.10 are additionally to their hazards of classes 1 to 6.2, 8 and 9 considered to be
environmentally hazardous substances. Other substances meeting the criteria of no other class, but
those of 2.2.9.1.10 are to be assigned to UN Nos. 3077 and 3082 as appropriate.
Wastes that do not meet the criteria for classification in classes 1 to 9 but are covered by the Basel
Convention on the Control of Transboundary Movements of Hazardous Wastes and their Disposal
may be carried under UN Nos. 3077 or 3082.
2.1.3.10 Table of precedence of hazards
Table of precedence of hazards
|
Class
and
packing
group
|
4.1, II
|
4,1, III
|
4.2, II
|
4.2, III
|
4.3, I
|
4.3, II
|
4.3, III
|
5.1, I
|
5.1, II
|
5,1, III
|
6.1, I DERMAL
|
6.1, I ORAL
|
6.1, II
|
6.1, III
|
8, I
|
8, II
|
8, III
|
9
|
|
3, I
|
SOL LIQ
4.1 3, I
|
SOL LIQ
4.1 3, I
|
SOL LIQ
4.2 3, I
|
SOL LIQ
4.2 3, I
|
4.3, I
|
4.3, I
|
4.3, I
|
SOL LIQ 5.1, I 3, I
|
SOL LIQ 5.1, I 3, I
|
SOL LIQ 5.1, I 3, I
|
3, I
|
3, I
|
3, I
|
3, I
|
3, I
|
3, I
|
3, I
|
3, I
|
|
3, II
|
SOL LIQ
4.1 3, II
|
SOL LIQ
4.1 3, II
|
SOL LIQ
4.2 3, II
|
SOL LIQ
4.2 3, II
|
4.3, I
|
4.3, II
|
4.3, II
|
SOL LIQ 5.1, I 3, I
|
SOL LIQ 5.1, II 3, II
|
SOL LIQ 5.1, II 3, II
|
3, I
|
3, I
|
3, II
|
3, II
|
8, I
|
3, II
|
3, II
|
3, II
|
|
3, III
|
SOL LIQ
4.1 3, II
|
SOL LIQ
4.1 3, III
|
SOL LIQ
4.2 3, II
|
SOL LIQ
4.2 3, III
|
4,3, I
|
4.3, II
|
4.3, III
|
SOL LIQ 5.1, I 3, I
|
SOL LIQ 5.1, II 3, II
|
SOL LIQ 5.1, III 3, III
|
6.1, I
|
6.1, I
|
6.1, II
|
3, III a
|
8, I
|
8, II
|
3, III
|
3, III
|
|
4.1, II
|
|
|
4.2, II
|
4.2, II
|
4.3, I
|
4.3, II
|
4.3, II
|
5.1, I
|
4.1, II
|
4.1, II
|
6.1, I
|
6.1, I
|
SOL LIQ 4.1, II 6.1, II
|
SOL LIQ 4.1, II 6.1, II
|
8, I
|
SOL LIQ 4.1, II 8, II
|
SOL LIQ 4.1, II 8, II
|
4.1, II
|
|
4.1, III
|
|
|
4.2, II
|
4.2, III
|
4.3, I
|
4.3, II
|
4.3, III
|
5.1, I
|
4,1, II
|
4.1, III
|
6.1, I
|
6.1, I
|
6.1, II
|
SOL LIQ 4.1, III 6.1, III
|
8, I
|
8, II
|
SOL LIQ 4.1, III 8, III
|
4.1, III
|
|
4.2, II
|
|
|
|
|
4.3, I
|
4.3, II
|
4.3, II
|
5.1, I
|
4.2, II
|
4.2, II
|
6.1, I
|
6.1, I
|
4.2, II
|
4.2, II
|
8, I
|
4.2, II
|
4.2, II
|
4.2, II
|
|
4.2, III
|
|
|
|
|
4.3, I
|
4.3, II
|
4.3, III
|
5.1, I
|
5.1, II
|
4.2, III
|
6.1, I
|
6.1, I
|
6.1, II
|
4.2, III
|
8, I
|
8, II
|
4,2, III
|
4.2, III
|
|
4.3, I
|
|
|
|
|
|
|
|
5.1, I
|
4.3, I
|
4.3, I
|
6.1, I
|
4.3, I
|
4.3, I
|
4.3, I
|
4,3, I
|
4.3, I
|
4.3, I
|
4.3, I
|
|
4.3, II
|
|
|
|
|
|
|
|
5.1, I
|
4.3, II
|
4.3, II
|
6.1, I
|
4.3, I
|
4.3, II
|
4.3, II
|
8, I
|
4.3, II
|
4.3, II
|
4.3, II
|
|
4.3, III
|
|
|
|
|
|
|
|
5.1, I
|
5.1, II
|
4.3, III
|
6.1, I
|
6.1, I
|
6.1, II
|
4.3, III
|
8, I
|
8, II
|
4.3, III
|
4.3, III
|
|
5.1, I
|
|
|
|
|
|
|
|
|
|
|
5.1, I
|
5.1, I
|
5,1, I
|
5.1, I
|
5,1, I
|
5,1, I
|
5.1, I
|
5,1, I
|
|
5.1, II
|
|
|
|
|
|
|
|
|
|
|
6.1, I
|
5.1, I
|
5.1, II
|
5.1, II
|
8, I
|
5.1, II
|
5.1, II
|
5.1, II
|
|
5.1, III
|
|
|
|
|
|
|
|
|
|
|
6.1, I
|
6.1, I
|
6.1, II
|
5.1, III
|
8, I
|
8, II
|
5.1, III
|
5.1, III
|
|
6.1, I DERMAL
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
SOL LIQ 6.1, I 8, I
|
6.1, I
|
6.1, I
|
6.1, I
|
|
6.1, I ORAL
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
SOL LIQ 6.1, I 8, I
|
6.1, I
|
6.1, I
|
6.1, I
|
|
6.1, II SOLUMA
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
SOL LIQ 6.1, I 8, I
|
6.1, II
|
6.1, II
|
6.1, II
|
|
6.1, II DERMAL
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
SOL LIQ 6.1, I 8, I
|
SOL LIQ 6.1, II 8, II
|
6.1, II
|
6.1, II
|
|
6.1, II ORAL
|
|
|
SOL = Solid substances and mixtures
LIQ = Liquid substances, mixtures and solutions
DERMAL = Dermal toxicity
ORAL = Oral toxicity
INHAL = Inhalation toxicity
a Class 6.1 for pesticides
|
8.1
|
SOL LIQ 6.1, II 8, II
|
6.1, II
|
6.1, II
|
|
6.1, III
|
|
|
8, I
|
8, II
|
8, III
|
6.1, III
|
|
8, I
|
|
|
|
|
|
8, I
|
|
8, II
|
|
|
|
|
|
8, II
|
|
8, III
|
|
|
|
|
|
8, III
|
NOTE 1: Examples to explain the use of the table
Classification of a single substance
Description of the substance to be classified:
An amine not mentioned by name meeting the criteria for Class 3, packing group II as well as those
for Class 8, packing group I.
Procedure:
The intersection of line 3 II with column 8 I gives 8 I.
This amine has therefore to be classified in Class 8 under:
UN No. 2734 AMINES LIQUID, CORROSIVE, FLAMMABLE, N.O.S. or UN No. 2734
POLYAMINES, LIQUID, CORROSIVE, FLAMMABLE, N.O.S.
packing group I
Classification of a mixture
Description of the mixture to be classified:
Mixture consisting of a flammable liquid classified in Class 3, packing group III, a toxic substance in
Class 6.1, packing group II and a corrosive substance in Class 8, packing group I.
Procedure:
The intersection of line 3 III with column 6.1 II gives 6.1 II.
The intersection of line 6.1 II with column 8 I gives 8 I LIQ.
This mixture not further defined has therefore to be classified in Class 8 under:
UN No. 2922 CORROSIVE LIQUID, TOXIC, N.O.S. packing group I.
NOTE 2: Examples for the classification of mixtures and solutions under a class and a packing
group:
A phenol solution of Class 6.1, (II), in benzene of Class 3, (II) is to be classified in Class 3, (II); this
solution is to be classified under UN No. 1992 FLAMMABLE LIQUID, TOXIC, N.O.S., Class 3, (II),
by virtue of the toxicity of the phenol.
A solid mixture of sodium arsenate of Class 6.1, (II) and sodium hydroxide of Class 8, (II) is to be
classified under UN No. 3290 TOXIC SOLID, CORROSIVE, INORGANIC, N.O.S., in Class 6.1 (II).
A solution of crude or refined naphthalene of Class 4.1, (III) in petrol of Class 3, (II), is to be
classified under UN No. 3295 HYDROCARBONS, LIQUID, N.O.S. in Class 3, (II).
A mixture of hydrocarbons of Class 3, (III), and of polychlorinated biphenyls (PCB) of Class 9, (II), is
to be classified under UN No. 2315 POLYCHLORINATED BIPHENYLS LIQUID or UN No. 3432
POLYCHLORINATED BIPHENYLS SOLID in Class 9, (II).
A mixture of propyleneimine of Class 3, and polychlorinated biphenyls (PCB) of Class 9, (II), is to be
classified under UN No. 1921 PROPYLENEIMINE, INHIBITED in Class 3.
Classification of samples
When the class of a substance is uncertain and it is being carried for further testing, a tentative class,
proper shipping name and UN number shall be assigned on the basis of the consignor's knowledge of
the substance and application of:
(a) the classification criteria of Chapter 2.2; and
(b) the requirements of this Chapter.
The most severe packing group possible for the proper shipping name chosen shall be used.
Where this provision is used the proper shipping name shall be supplemented with the word
"SAMPLE" (e.g., "FLAMMABLE LIQUID, N.O.S., SAMPLE"). In certain instances, where a
specific proper shipping name is provided for a sample of a substance considered to meet certain
classification criteria (e.g., GAS SAMPLE, NON-PRESSURIZED, FLAMMABLE, UN No. 3167)
that proper shipping name shall be used. When an N.O.S. entry is used to carry the sample, the proper
shipping name need not be supplemented with the technical name as required by special provision 274
of Chapter 3.3.
Samples of the substance shall be carried in accordance with the requirements applicable to the
tentative assigned proper shipping name provided:
(a) The substance is not considered to be a substance not accepted for carriage by sub-sections
2.2.x.2 of Chapter 2.2 or by Chapter 3.2;
(b) The substance is not considered to meet the criteria for Class 1 or considered to be
an infectious substance or a radioactive material;
(c) The substance is in compliance with 2.2.41.1.15 or 2.2.52.1.9 if it is a self-reactive substance
or an organic peroxide, respectively;
(d) The sample is carried in a combination packaging with a net mass per package not exceeding
2.5 kg; and
(e) The sample is not packed together with other goods.
Classification of packagings, discarded, empty, uncleaned
Empty uncleaned packagings, large packagings or IBCs, or parts thereof, carried for disposal,
recycling or recovery of their material, other than reconditioning, repair, routine maintenance,
remanufacturing or reuse, may be assigned to UN 3509 if they meet the requirements for this entry.
CLASS SPECIFIC PROVISIONS
Class 1 Explosive substances and articles
Criteria
The heading of Class 1 covers:
(a) Explosive substances: solid or liquid substances (or mixtures of substances) capable by
chemical reaction of producing gases at such a temperature and pressure and at such a speed as
to cause damage to the surroundings.
Pyrotechnic substances: substances or mixtures of substances designed to produce an effect by
heat, light, sound, gas or smoke or a combination of these as the result of non-detonating
self-sustaining exothermic chemical reactions;
NOTE 1: Substances which are not themselves explosive but which may form an explosive
mixture of gas, vapour or dust are not substances of Class 1.
NOTE 2: Also excluded from Class 1 are: water- or alcohol-wetted explosives of which the
water or alcohol content exceeds the limits specified and those containing plasticizers - these
explosives are assigned to Class 3 or Class 4.1 - and those explosives which, on the basis of
their predominant hazard, are assigned to Class 5.2.
(b) Explosive articles: articles containing one or more explosive or pyrotechnic substances;
NOTE: Devices containing explosive or pyrotechnic substances in such small quantity or of
such a character that their inadvertent or accidental ignition or initiation during carriage
would not cause any manifestation external to the device by projection, fire, smoke, heat or
loud noise are not subject to the requirements of Class 1.
(c) Substances and articles not mentioned above which are manufactured with a view to producing
a practical effect by explosion or a pyrotechnic effect.
For the purposes of Class 1, the following definition applies:
Phlegmatized means that a substance (or "phlegmatizer") has been added to an explosive to enhance
its safety in handling and carriage. The phlegmatizer renders the explosive insensitive, or less
sensitive, to the following actions: heat, shock, impact, percussion or friction. Typical phlegmatizing
agents include, but are not limited to: wax, paper, water, polymers (such as chlorofluoropolymers),
alcohol and oils (such as petroleum jelly and paraffin).
