Respiratory Protection - Categories of Hazards

Respiratory Protection - Categories of Hazards


These are particles that vary in size resulting from the breaking up of solids. The smaller the particle the greater the hazard that it presents. Fibres from materials should also be treated as dust particles.


Gaseous state of substances that are liquids or solids at room temperature (vapour). A gaseous state is formed by evaporation from substances that are normally either solid or liquid at room temperature.


These are clouds of fine droplets or particles formed by spraying, which can be water or oil based. Mists are often combinations of several hazardous  ingredients formed by processes that involve atomisation and consist of tiny
liquid droplets.


Are organic or inorganic compounds that become airborne and are able to diffuse or spread freely. Gases can travel very far very quickly.


These are solid aerosols that are formed when metallic vapours condense on cooling and may be produced by welding, galvanising or similar processes involving hot metal.

Oxygen Deficiency/Enrichment

When an atmosphere is likely to contain less than 19% oxygen, or where conditions may exist in the future to cause this to happen, the area is considered oxygen deficient and a hazard.

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See our Respiratory Protection Products here: