Assignment of the packing groups

When indicated in column (4) of Table A of Chapter 3.2, substances and articles of Class 9 are
assigned to one of the following packing groups according to their degree of danger:
Packing group II: substances presenting medium danger;
Packing group III: substances presenting low danger.

Substances and articles not accepted for carriage

The following substances and articles shall not be accepted for carriage:
- Lithium batteries which do not meet the relevant conditions of special provisions 188, 230, 310
or 636 of Chapter 3.3;
- Uncleaned empty containment vessels for apparatus such as transformers, condensers and
hydraulic apparatus containing substances assigned to UN Nos. 2315, 3151, 3152 or 3432.
15 For
 
15 For UN No. 1845 carbon dioxide, solid (dry ice) used as a coolant, see 5.5.3.

List of entries

General

Unless otherwise provided for in Chapter 2.2 or in this Chapter, the test methods to be used for the
classification of dangerous goods are those described in the Manual of Tests and Criteria.

2.3

TEST METHODS

Exudation test for blasting explosives of Type A

Blasting explosives of type A (UN No. 0081) shall, if they contain more than 40% liquid nitric ester,
in addition to the testing specified in the Manual of Tests and Criteria, satisfy the following exudation
test.

The apparatus for testing blasting explosive for exudation (figs. 1 to 3) consists of a hollow bronze
cylinder. This cylinder, which is closed at one end by a plate of the same metal, has an internal
diameter of 15.7 mm and a depth of 40 mm. It is pierced by 20 holes 0.5 mm in diameter (four sets
of five holes) on the circumference. A bronze piston, cylindrically fashioned over a length of 48 mm
and having a total length of 52 mm, slides into the vertically placed cylinder. The piston, whose
diameter is 15.6 mm, is loaded with a mass of 2 220 g so that a pressure of 120 kPa (1.20 bar) is
exerted on the base of the cylinder.

A small plug of blasting explosive weighing 5 to 8 g, 30 mm long and 15 mm in diameter, is wrapped
in very fine gauze and placed in the cylinder; the piston and its loading mass are then placed on it so
that the blasting explosive is subjected to a pressure of 120 kPa (1.20 bar). The time taken for the
appearance of the first signs of oily droplets (nitroglycerine) at the outer orifices of the cylinder holes
is noted.

The blasting explosive is considered satisfactory if the time elapsing before the appearance of the
liquid exudations is more than five minutes, the test having been carried out at a temperature of 15 °C
to 25 °
 
Test of blasting explosive for exudation

Tests relating to nitrated cellulose mixtures of Class 4.1

Nitrocellulose heated for half an hour at 132 °C shall not give off visible yellowish-brown nitrous
fumes (nitrous gases). The ignition temperature shall be above 180 °C. See 2.3.2.3 to 2.3.2.8, 2.3.2.9
(a) and 2.3.2.10 below.

3 g of plasticized nitrocellulose, heated for one hour at 132 °C, shall not give off visible
yellowish-brown nitrous fumes (nitrous gases). The ignition temperature shall be above 170 °C. See
2.3.2.3 to 2.3.2.8, 2.3.2.9 (b) and 2.3.2.10 below.

The test procedures set out below are to be applied when differences of opinion arise as to the
acceptability of substances for carriage by road.

If other methods or test procedures are used to verify the conditions of stability prescribed above in
this section, those methods shall lead to the same findings as could be reached by the methods
specified below.
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