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IMO / IMDG Table

The 9 classes of dangerous goods under the IMDG Code, the on-board segregation matrix, and the country-specific restrictions for LATAM ports.

1
Class 1

Explosives

Substances and articles that pose a mass-explosion, projection, or fire hazard.

Examples

Gunpowder, detonators, dynamite, fireworks, ammunition.

2.1
Class 2.1

Flammable gases

Gases that are flammable in mixture of 13% or less by volume with air.

Examples

Propane, butane, acetylene, hydrogen.

2.2
Class 2.2

Non-flammable, non-toxic gases

Asphyxiating, oxidizing, or low-hazard gases.

Examples

Helium, nitrogen, compressed oxygen, CO₂.

2.3
Class 2.3

Toxic gases

Gases toxic or corrosive to humans by inhalation.

Examples

Chlorine, anhydrous ammonia, ethylene oxide.

3
Class 3

Flammable liquids

Liquids with flash point ≤ 60°C in closed cup.

Examples

Gasoline, diesel, alcohol, paints, solvents, perfumes.

4.1
Class 4.1

Flammable solids

Solids that ignite easily or can cause fire by friction.

Examples

Matches, sulfur, naphthalene, magnesium powder.

4.2
Class 4.2

Spontaneously combustible

Material that can heat up and ignite on air contact.

Examples

White phosphorus, wet activated carbon, some oilseeds.

4.3
Class 4.3

Dangerous when wet

Substances that release flammable gases on water contact.

Examples

Sodium, potassium, metallic calcium, carbides.

5.1
Class 5.1

Oxidizing substances

Substances that release oxygen and can cause or intensify fire.

Examples

Hydrogen peroxide, nitrates, chlorates, permanganate.

5.2
Class 5.2

Organic peroxides

Thermally unstable organic compounds that may decompose violently.

Examples

Benzoyl peroxide, methyl ethyl ketone peroxide.

6.1
Class 6.1

Toxic substances

Substances that can cause death or severe injury if ingested, inhaled, or touched.

Examples

Pesticides, cyanides, arsenic, mercury.

6.2
Class 6.2

Infectious substances

Substances containing pathogens that can cause disease.

Examples

Medical samples, hospital waste, viral cultures.

7
Class 7

Radioactive material

Materials with specific activity > 70 kBq/kg.

Examples

Uranium, medical isotopes, radioactive measurement equipment.

8
Class 8

Corrosive substances

Substances that by chemical action cause severe damage to tissue or materials.

Examples

Sulfuric acid, sodium hydroxide, batteries, hydrochloric acid.

9
Class 9

Miscellaneous dangerous goods

Substances and articles that present a hazard during transport not covered by other classes.

Examples

Lithium batteries, asbestos, dry ice, engines with fuel.

Notice: the diamonds shown are a reference rendering with the official color of each class. For real packaging and container labeling, use the official IMDG Code pictographic symbols.
This tool is informational and educational. The official dangerous goods declaration — in any mode (maritime IMDG, air IATA-DGR, road ADR) — must be made by a currently certified consultant in accordance with origin and destination country regulations.