Hazard Symbols (2024)

Physical Hazard ClassGeneral Description

Flammable gases;

Flammable aerosols;

Flammable liquids; Flammable solids

These four classes include products that have the ability to ignite (i.e. catch fire) easily. Explosion or fires are the main hazards.Oxidizing gases; Oxidizing liquids;

Oxidizing solids

These three classes include oxidizers, which may cause or intensify a fire or explosion.Gases under pressureThis class includes compressed gases, liquefied gases, dissolved gases and refrigerated gases. Compressed, liquefied, and dissolved gases are hazardous because of the high pressure contents of the cylinder/container. The cylinder/container may explode if heated. Refrigerated liquefied gases are very cold and can cause severe cold burns and/or injury.Self-reactive substances and mixturesThis class includes products that may react on their own, or if heated, and cause a fire or an explosion.Pyrophoric liquids; Pyrophoric solidsThis class includes product that can spontaneously catch fire if exposed to air.Self-heating substances and mixturesThis class includes products that may catch fire if exposed to air. These products differ from pyrophoric liquids or solids because they will only ignite after a longer period of time or when present in large quantities.Substances and mixtures which, in contact with

water, emit flammable gases

This class includes products that react with water and releases flammable gases. Sometimes, the flammable gases spontaneously ignite.Organic peroxidesThis class includes products that are highly reactive, unstable, and/or explosive. If heated, these products may cause a fire or an explosion.Corrosive to metalsThis class includes products that may be corrosive (i.e. chemically damaging and/or destructive) to metals.Combustible dustsThis class warns about products that are finely divided solid particles. If dispersed in air, the particles may catch on fire or explode if ignited.Simple asphyxiantsThis class includes products which are gases that may displace the oxygen in the air and cause suffocation.Physical hazards not otherwise classifiedThis class includes products that cause physical hazards that are not covered in any of the other physical hazard classes. These hazards involve chemical reactions that can cause serious injuries or death. If a product is classified under this class, the nature of the hazard will be described in the hazard statement on the label and SDS.Health Hazard ClassAcute toxicityThis class includes products that are fatal, toxic, or harmful if inhaled, if in contact with skin, or if swallowed.Skin corrosion/irritationThis class includes products that cause severe skin burns (i.e. corrosion) and products that cause skin irritation.Serious eye damage/eye irritationThis class includes products that cause serious eye damage (i.e. corrosion) and products that cause eye irritation.Respiratory or skin sensitizationThis class includes products which are classified as a respiratory or skin sensitizer. Respiratory sensitizers are products that may cause allergy or asthma symptoms and/or cause breathing difficulties when inhaled. Skin sensitizers are products that may cause an allergic skin reaction.Germ cell mutagenicityThis class includes products that may cause or are suspected of causing genetic defects.CarcinogenicityThis class includes products that cause or are suspected of causing cancer.Reproductive toxicityThis class includes products that may damage or are suspected of damaging fertility and/or the unborn child.Specific target organ toxicity- single exposureThis class includes products that cause or may cause damage to organs (e.g., liver, kidneys, or blood) following a single exposure.Specific target organ toxicity- repeated

exposure

This class includes products that cause or may cause damage to organs (e.g., liver, kidneys, or blood) following prolonged or repeated exposure.Aspiration hazardThis class includes products that may be fatal if they are swallowed and/or enter the airways.Biohazardous infectious materialsThis class includes products which are micro-organisms (e.g., viruses, bacteria, or fungi), nucleic acids (e.g., DNA or RNA), or proteins that cause or probable causers of infection, with or without toxicity, in humans or animals.Health hazards not otherwise classifiedThis class includes products that cause health hazards that are not included in any other health hazard class. These hazards occur following acute or repeated exposure and have adverse effects on the health of a person exposed to them -including injury or death. If a product is classified under this class, the nature of the hazard will be described in the hazard statement on the label and SDS.