UN 1950 Aerosols, flammable, containing toxic gas UN Rec. 23rd rev. ed. (Shortinfo)

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: (a) Division 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; (b) Division 2.2 applies if the contents contain 1% by mass or less flammable components and the heat of combustion is 30 kJ/ or more; (c) Otherwise the product shall be classified as tested by the test described in the Manual of Test and Criteria, Part III, section 31. Extremly flammable aerosols shall be classified in Division 2.1; non-flammable in Division 2.2; (d) Gases of Division 2.3 shall not be used as a propellant in an aerosol dispenser; (e) Where the contents other than the propellant of aerosol dispensers to be ejected aqre classified as Division 6.1 packing groups II or III or Class 8 packing groups II or III, the aerosol shall have a subsidiary hazard of Division 6.1 or Class8; (f) Aerosols with contents meeting the criteria for packing group I for toxicity or corrosivity shall be prohibited from transport; (g) Subsiadiary hazard labels may be required for air transport. 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 D 240, 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 these regulations.

For aerosols or receptacles containing toxic substances the limited quantity value 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 (c) 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 Division 2.2 and have been pierced are not subject to these Regulations.

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 18th revised edition of the United Nations Recommendations on the Transport of Dangerous Goods, Model Regulations, may be used until 31 December 2022.