IMO Class Dangerous Goods List

IMO Class Dangerous Goods -

ClassDescriptionSymbol Image
SubClass 2.2-Optional - Oxygen GasThis is an optional placard to the 2.2 Non-flammable Gas placard for compressed Oxygen in either the gas or liquid state. Oxygen is considered a non-flammable because it in and of itself does not burn. It is, however, required for combustion to take place. High concentrations of oxygen greatly increases the rate and intensity of combustion.
SubClass 2.3 - Poison GasGas poisonous by inhalation means a material which is a gas at 20°C or less and a pressure of 101.3 kPa (a material which has a boiling point of 20°C or less at 101.3kPa (14.7 psi)) and which: 1. is known to be so toxic to humans as to pose a hazard to health during transportation, or 2. in the absence f adequate data on human toxicity, is presumed to be toxic to humans because when tested on laboratory animals it has an LC50 value of not more than 5000 ml/m3.
Class 3 - Flammable LiquidsA flammable liquid (Class 3) means a liquid having a flash point of not more than 60.5°C (141°F), or any material in a liquid phase with a flash point at or above 37.8°C (100°F) that is intentionally heated and offered for transportation or transported at or above its flash point in a bulk packaging.
Class 4 - Flammable Solids or Substances 
SubClass 4.1 - Flammable solidsDesensitized explosives that when dry are explosives of Class 1 and are specifically authorized by name or have been assigned a shipping name and hazard class by the Associate Administrator. Self-reactive materials,which are thermally unstable and that can undergo a strongly exothermic decomposition even without participation of air. Readily combustible solids that can cause a fire through friction and show a burning rate faster than 2.2 mm (0.087 inches) per second, or metal powders that can be ignited and react over the whole length of a sample in 10 minutes or less.
SubClass 4.2 - Substances liable to spontaneous combustionSpontaneously Combustible material is a pyrophoric material, which is a liquid or solid that can ignite within five (5) minutes after coming in contact with air or a self-heating material that when in contact with air and without an energy supply is liable to self-heat.
SubClass 4.3 - Substances which, in contact with water, emit flammable gases.Dangerous When Wet material is a material that when it makes contact with water is liable to become spontaneously flammable or give off flammable or toxic gas at a rate greater than 1 L per kilogram of the material per hour.
Class 5 - Oxidizing Substances (agents) and Organic Peroxides 
SubClass 5.1 - Oxidizing substances (agents) by yielding oxygen increase the risk and intensity of fireOxidizer (Division 5.1) means a material that may, generally by yielding oxygen, cause or enhance the combustion of other materials.
SubClass 5.2 - Organic peroxides - most will burn rapidly and are sensitive to impact or frictionOrganic peroxide (Division 5.2) means any organic compound containing oxygen (O) in the bivalent -O-O- structure and which may be considered a derivative of hydrogen peroxide, where one or more of the hydrogen atoms have been replaced by organic radicals.