Exposure to low levels of these gases may produce lung and eye irritations, dizziness, drowsiness and headaches. High levels will quickly render a worker unconscious, and death will follow. Always follow label directions when handling these chemicals. Labels will list potential hazards to workers and identify the personal protective equipment necessary during handling. Do not use air purifiers to provide protection from the dangers of oxygen-limited environments.
Respirators are effective only up to their specified concentration limits.
The composition of a respirator's filter depends on the contaminant to be filtered. Various chemicals are used to remove gases and vapors. The useful life of the respirator is determined by the contaminant concentration, breathing volume of the wearer and capacity of the air purifying medium. This type of respirator provides protection against particulates such as dusts, mists or metal fumes. A fibrous material in the filter traps the particles.