MHR 711 Lecture Notes - Lecture 6: Hypodermic Needle, Chemical Pneumonitis, Vapor Pressure
14 Dec 2016
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Document Summary
Oh&s key terms: chemical agents, biohazard, ambient, toxicity. Vapours entering the atmosphere from solvents such as paint thinners are included in the chemical reaction category, because the vapours from the solvents can react to such things as heat and pressure. In this vein, airborne particulates (e. g. , dust created by mechanical means such as sanding or grinding) are included in the physical reaction category because the contaminant is caused by an expenditure of energy or work. These categories account for most of the health hazards found in industry and at home (see oh&s. Such agents may be hazards in and of themselves, but they can also interact synergistically with lifestyle or environmental factors. Synergistic effects occur when the result of two factors taken together is greater than the sum of the two. For example, a lifestyle factor such as smoking can have a synergistic effect on some materials.
