GLOSSARY

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

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ORAL TOXICITY

Adverse effects resulting from taking a substance into the body via the mouth.


ORANGE PEEL

In spray painting, a defect in which the coating has the texture of an orange peel. The varied causes include holding the gun too close to the surface or using a thinner which dries too quickly.


ORGANIC

Of, related to or arising in a bodily organ; materials or chemicals containing carbon atoms. Substances derived from living organisms (plant or animal).


ORGANIC COMPOUND

A category of solvent or vapour derived from petroleum or other natural source which has the property of readily evaporating into the environment, used as fuels, solvents, and vehicles for paints and coatings;


ORGANIC PEROXIDE

An organic chemical compound that contains a bivalent (-O-O-) structure, and which may be considered to be a structural derivative of hydrogen peroxide, where on or both of the hydrogen atoms has been replaced by an organic radical.


ORGANIC VAPOUR ARRESTOR

A respiratory protection device that employs cartridges (activated carbon) capable of removing organic solvent vapours from respired air. see _respiratory protection_


ORGANICS

Materials or compounds derived from vegetable or animal life, including petroleum derivatives.


ORGANISM

An individual animal or plant life form.


ORGANOPHOSPHATE

An organic pesticide (e.g., Malathion) that acts by inhibiting cholinesterase, an enzyme that hydrolyses (splits chemical bonds and adds water elements to a substance) choline esters, and that is found especially in blood plasma.


OUTDOOR AIR

Air outside a building. It can enter the conditioned space via the ventilation system, or by infiltration through holes in the pressure boundary or designed ventilation openings.