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Substances that can dissolve organic tissue or severely corrode certain metals. Precautions include using corrosion-resistant containers and avoiding skin contact. Emergency response often requires neutralization of the corrosive agents and disposal in accordance with environmental regulations.

Materials that can explode and are capable of a chemical reaction that produces gas at a temperature, pressure, and speed that can cause catastrophic damage. Precautions include careful handling and storage away from heat sources. Emergency response often involves evacuation and calling in specialized bomb disposal teams.

These are liquids with a flash point of not more than 60°C. Precautions include storage in tightly closed containers away from ignition sources. Emergency response involves using non-water extinguishing agents and avoiding spillage into the environment.

Substances which can harm the marine environment. Precautions include proper labelling and adequate containment. Emergency response typically involves cleanup operations and preventing the pollutant from entering open water.

Substances that are liable to cause death or injury if swallowed, inhaled, or by skin contact. Precautions include use of PPE and secure containment. Emergency response typically involves spill cleanup by trained personnel and medical treatment for exposure.

Substances that are readily combustible or may cause or contribute to fire through friction. Precautions include storage away from moisture and ignition sources. Emergency response typically includes fire suppression with appropriate extinguishers and preventing the spread of fire.

Materials that can release oxygen to support the combustion of other materials and may be sensitive to heat. Precautions include segregation from flammables and storing in a cool place. Emergency response could involve flooding the material with water in case of a fire.

Any material containing radionuclides where both the activity concentration and the total activity exceed certain predefined values. Precautions include shielding and distance to reduce exposure. Emergency response can involve isolation of the area and radiological monitoring.

A group of individuals with specialized training in handling hazardous materials incidents. Precautions involve regular training and drills. Emergency response includes containment, mitigation, and cleanup of hazardous materials spills.

This class includes compressed, liquefied, or dissolved under pressure gases. Precautions involve ensuring good ventilation and secure stowage to prevent gas release. Emergency response includes using appropriate personal protective equipment (PPE) and securing the area to prevent ignition or asphyxiation hazards.

The International Maritime Dangerous Goods Code that prescribes guidelines for the safe transport of dangerous goods by sea. Precautions include following packing, labeling, and stowage requirements. Emergency responses are guided by the code's emergency schedules.