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MILK STONE – Calcium deposits on dairy or ice cream equipment.

MOLD – A woolly growth, produced by a fungus.

MURIATIC – Commercial name given to hydrochloric acid.

NEUTRAL CLEANER – Non-alkaline, non-acid cleaner. The pH of mild neutral cleaners may be as high as 10 and not contain harsh alkalis.

NEUTRALIZER – Chemical to change the pH of a surface so that residues will not interfere with floor coating adhesion.

NON-CHLORINE BLEACH – A laundry product containing peroxygen compounds, which release active oxygen in wash water. This type product produces gentler bleaching action than chlorine bleach.

OPTICAL BRIGHTENER – Substance that makes color appear brighter in the presence of sunlight and ultraviolet light.

ORGANISM – Any individual animal, plant or bacterium.

OVEN CLEANER – Usually a liquid in an aerosol container or pump-actuated bottle. To clean a cold oven a strong chemical is necessary. Usually the product is thick
or foamy to promote clinging to vertical surfaces.

OXIDATION – To combine with oxygen. Slow oxidation is typified by the rusting of a metal.