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ACGIH

The American Conference of Governmental Industrial Hygienists, Inc., (ACGIH) deals with the protection of the health of those involved in industry. ACGIH investigates, reviews and recommends exposure limits for chemical substances and publishes "Threshold Limit Values (TLVs)" for over 700 chemical substances and physical agents. For more information: www.acgih.org

Acute Effect

An effect that occurs almost immediately (hours/days) after a single or brief exposure to a toxic agent. Generally, acute effects will be evident within 14 days

Allergy

An immune hypersensitivity reaction of body tissues to allergens that can affect the skin (urticaria), respiratory tract (asthma), gastrointestinal tract (vomiting and nausea) or produce a systemic circulatory response (anaphylactic response).

Acute Health Effect

An adverse health effect resulting from a single exposure to a substance.

Aerosols

Aerosols are airborne particulates. They may be solids or liquid droplets.

Ambient environment

The surrounding environment. This can refer to ambient air, ambient water, or ambient soil.

Anemia

A condition in which there is reduced or impaired red blood cells or hemoglobin resulting in an inadequate capacity of the blood to transport oxygen to body tissues.

Anoxia

An insufficient (below normal) supply of oxygen in the body tissues.

Antidote

A remedy for counteracting a poison.

Asphyxiant

A relatively non-toxic gas that in high concentrations in the air results in insufficient oxygen in arterial blood or in the tissues.

Aspiration

The act of breathing in particulates or mists.