Page 3 - PPE GUIDELINE
P. 3
Guidelines on the Use of PPE Against Chemical Hazards
Dust
An aerosol consisting of solid particles derived from the breaking up of larger
particles.
End-of-service-life indicator
A system that warns the user of the approach of the end of adequate respiratory
protection.
Filter
A component used in respirators to remove solid or liquid aerosols from the inhaled
air.
Full face-piece
A face-piece that covers the face from roughly the hairline to below the chin.
Fumes
Solid aerosols of extremely small particle size, generated by condensation of a
substance from vapour state to the solid state. It is normally associated with molten
metal where the metal is vaporised, followed by the oxidation of the vapour and
condensation of the oxide into fine solid particles.
Gas
A fluid that has neither independent shape nor volume
Half face-piece
A face-piece that fits over the nose and under the chin.
Immediately Dangerous to Life and Health or IDLH
An atmosphere that poses an immediate threat to life, would cause irreversible
adverse health effects, or would impair an individual’s ability to escape from a
dangerous atmosphere. Examples are an atmosphere containing less than 16% oxygen
or an atmosphere containing hydrogen cyanide in excess of 50ppm.
Mist
An aerosol composed of liquid particles.
Department of Occupational Safety & Health, Ministry of Human Resources, Malaysia October 2005 3
