AEROSOLS

The division of class 2 and the subsidiary hazards depend on the nature of the contents of the aerosol dispenser. The following provisions shall apply:

.1 Class 2.1 applies if the contents include 85% by mass or more flammable
components and the chemical heat of combustion is 30 kJ/g or more;

.2 Class 2.2 applies if the contents contain 1% by mass or less flammable
components and the heat of combustion is less than 20 kJ/g.

.3 Otherwise the product shall be classified as tested by the tests described
in the Manual of Tests and Criteria, part III, section 31.
Extremely flammable and flammable aerosols shall be classified in class
2.1; non-flammable in class 2.2;

.4 Gases of class 2.3 shall not be used as a propellant in an aerosol
dispenser;

.5 Where the contents other than the propellant of aerosol dispensers to be
ejected are classified as class 6.1 packing groups II or III or class 8
packing groups II or III, the aerosol shall have a subsidiary hazard of
class 6.1 or class 8

.6 Aerosols with contents meeting the criteria for packing group I for
toxicity or corrosivity shall be prohibited from transport.

.7 Except for consignments transported in limited quantities (see chapter
3.4), packages containing aerosols shall bear labels for the primary risk
and for the subsidiary hazard(s), if any.

Flammable components are flammable liquids, flammable solids or flammable gases and gas mixtures as defined in Notes 1 to 3 of sub-section 31.1.3 of part III of the Manual of Tests and Criteria. This designation does not cover pyrophoric, self-heating or water-reactive substances. The chemical heat of combustion shall be determined by one of the following methods: ASTM D240, ISO/FDIS 13943: 1999 (E/F) 86.1 to 86.3 or NFPA 30B.

Aerosol dispensers shall be provided with protection against inadvertent discharge. Aerosols with a capacity not exceeding 50 mL containing only non-toxic constituents are not subject to the provisions of this Code.

For aerosols or receptacles containing toxic substances, the limited quantity value for the purposes of exemptions in chapter 3.4 is 120 mL. For all other aerosols or receptacles, the limited quantity value is 1,000 mL.

Waste aerosols and waste gas cartridges consigned in accordance with 5.4.1.4.3.3 may be transported under UN 1950 or UN 2037, as appropriate, for the purposes of reprocessing or disposal. They need not be protected against movement and inadvertent discharge provided that measures to prevent dangerous build-up of pressure and dangerous atmospheres are addressed. Waste aerosols, other than those leaking or severely deformed, shall be packed in accordance with packing instruction P207 and special provision PP87, or packing instruction LP200 and special packing provision L2. Waste gas cartridges, other than those leaking or severely deformed, shall be packed in accordance with packing instruction P003 and special packing provisions PP17 and PP96, or packing instruction LP200 and special packing provision L2. Leaking or severely deformed aerosols and gas cartridges shall be transported in salvage pressure receptacles or salvage packagings provided appropriate measures are taken to ensure there is no dangerous build-up of pressure. Waste aerosols and waste gas cartridges shall not be transported in closed freight containers.

Waste gas cartridges that were filled with gases of class 2.2 and have been pierced are not subject to this Code.

The provisions of 6.2.4 shall be met.

Large packagings conforming to the packing group III performance level used in accordance with packing instruction LP02 of 4.1.4.3, as prescribed in the IMDG Code (amendment 37-14), may be used until 31 December 2022.

Waste aerosols or waste gas cartridges authorized for transport under special provisions 327 shall only be transported on short international voyages. Long international voyages are authorized only with the approval of the competent authority. Packagings shall be marked and labelled and cargo transport units shall be marked and placarded for appropriate sub-division of class 2 and, if applicable, the subsidiary hazard(s).