Certain substances and articles possessing certain hazard not covered by any other classes (class 1 to 8) are assigned to Class 9.

Class 9 includes, inter alia (Among other things):

.1 substances and articles not covered by other classes which experience has shown, or may show, to be of such a dangerous character that the provisions of part A of chapter VII of SOLAS 1974, as amended, shall apply.

.2 substances not subject to the provisions of part A in chapter VII of of SOLAS 1974, as amended,, but to which the provisions of Annex III of MARPOL 73/78, as amended, apply.

 The substances and articles of Class 9 are subdivided as follows:

Substances which, on inhalation as fine dust, may endanger health

• 2212 BLUE ASBESTOS (crocidolite) or
• 2212 BROWN ASBESTOS (amosite, mysorite)
• 2590 WHITE ASBESTOS (chrysotile, actinolite, anthophyllite, tremolite)

 Substances evolving flammable vapour

• 2211 POLYMERIC BEADS, EXPANDABLE, evolving flammable vapour
• 3314 PLASTICS MOULDING COMPOUND in dough, sheet or extruded rope form evolving flammable vapour

 Lithium batteries

• 3090 LITHIUM METAL BATTERIES (including lithium alloy batteries)
• 3091 LITHIUM METAL BATTERIES CONTAINED IN EQUIPMENT (including lithium alloy batteries) or
• 3091 LITHIUM METAL BATTERIES PACKED WITH EQUIPMENT (including lithium alloy batteries)
• 3480 LITHIUM ION BATTERIES (including lithium ion polymer batteries)
• 3481 LITHIUM ION BATTERIES CONTAINED IN EQUIPMENT (including lithium ion polymer batteries) or
• 3481 LITHIUM ION BATTERIES PACKED WITH EQUIPMENT (including lithium ion polymer batteries)

Life-saving appliances

• 2990 LIFE-SAVING APPLIANCES, SELF-INFLATING
• 3072 LIFE-SAVING APPLIANCES NOT SELF-INFLATING containing dangerous goods as equipment
• 3268 AIR BAG INFLATORS or
• 3268 AIR BAG MODULES or
• 3268 SEAT-BELT PRETENSIONERS

 Substances and articles which, in the event of fire, may form dioxins

 This group of substances includes:

• 2315 POLYCHLORINATED BIPHENYLS, LIQUID
• 3432 POLYCHLORINATED BIPHENYLS, SOLID
• 3151 POLYHALOGENATED BIPHENYLS, LIQUID or
• 3151 POLYHALOGENATED TERPHENYLS, LIQUID
• 3152 POLYHALOGENATED BIPHENYLS, SOLID or
• 3152 POLYHALOGENATED TERPHENYLS, SOLID

Examples of articles are transformers, condensers and apparatus containing those substances.

 Substances transported or offered for transport at elevated temperatures

• 3257 ELEVATED TEMPERATURE LIQUID, N.O.S., at or above 100°C and below its flashpoint (including molten metal, molten salts, etc.)
• 3258 ELEVATED TEMPERATURE SOLID, N.O.S., at or above 240°C

 Environmentally hazardous substances

• 3077 ENVIRONMENTALLY HAZARDOUS SUBSTANCE, SOLID, N.O.S.
• 3082 ENVIRONMENTALLY HAZARDOUS SUBSTANCE, LIQUID, N.O.S.

 Genetically modified micro-organisms (GMMOs) and genetically modified organisms (GMOs)

• 3245 GENETICALLY MODIFIED MICRO-ORGANISMS or
• 3245 GENETICALLY MODIFIED ORGANISMS

 Other substances or articles presenting a danger during transport, but not meeting the definitions of another class:

• 1841 ACETALDEHYDE AMMONIA
• 1845 CARBON DIOXIDE, SOLID (DRY ICE)
• 1931 ZINC DITHIONITE (ZINC HYDROSULPHITE)
• 1941 DIBROMODIFLUOROMETHANE
• 1990 BENZALDEHYDE
• 2071 AMMONIUM NITRATE BASED FERTILISER
• 2216 FISH MEAL (FISH SCRAP), STABILIZED
• 2807 MAGNETIZED MATERIAL
• 2969 CASTOR BEANS or
• 2969 CASTOR MEAL or
• 2969 CASTOR POMACE or
• 2969 CASTOR FLAKE
• 3166 ENGINE, INTERNAL COMBUSTION or
• 3166 VEHICLE, FLAMMABLE GAS POWERED or
• 3166 VEHICLE, FLAMMABLE LIQUID POWERED or
• 3166 ENGINE, FUEL CELL, FLAMMABLE GAS POWERED or
• 3166 ENGINE, FUEL CELL, FLAMMABLE LIQUID POWERED or
• 3166 VEHICLE, FUEL CELL, FLAMMABLE GAS POWERED or
• 3166 VEHICLE, FUEL CELL, FLAMMABLE LIQUID POWERED
• 3171 BATTERY-POWERED VEHICLE or
• 3171 BATTERY-POWERED EQUIPMENT
• 3316 CHEMICAL KIT or
• 3316 FIRST AID KIT
• 3334 AVIATION REGULATED LIQUID, N.O.S.
• 3335 AVIATION REGULATED SOLID, N.O.S.
• 3359 FUMIGATED CARGO TRANSPORT UNIT
• 3363 DANGEROUS GOODS IN MACHINERY or
• 3363 DANGEROUS GOODS IN APPARATUS
• 3496 BATTERIES, NICKEL-METAL HYDRIDE.