Pertaining to chemistry; characterized or produced by the forces and operations of chemistry; employed in the processes of chemistry; as, chemical changes; chemical combinations.

A substance used for producing a chemical effect; a reagent.

Pesticides used to control weeds, diseases or pests

In science, chemicals are elementary substances such as oxygen, hydrogen, nitrogen, etc. In the context of home composting, however, the word "chemical" is often used to describe a philosophy considered to be in opposition to the organic philosophy. In general, the chemical philosophy encourages people to force nature to do what they want by applying synthetic pesticides and fertilizers which may get the temporary results they want, but may harm or not enhance the general soil condition and environment.

a health hazard if it causes acute or chronic health effects in employees who have been exposed

a health hazard if there is statistically significant evidence, based on at least one study conducted in accordance with established scientific principles that acute or chronic health effects may occur in exposed employees

a physical hazard if there is scientifically valid evidence that it is a combustible liquid, a compressed gas, an explosive, an organic peroxide, an oxidizer or pyrophoric, flammable, or reactive

Hygiene Plan A written program developed and implemented by the employer which sets forth procedures, equipment, personal protective equipment, and work practices that are capable of protecting employees from the health hazards presented by hazardous chemicals used in that particular workplace.  The ECU plan is available for view on the EHS web page at http://www.ecu.edu/oehs/labsafetymain

One of the millions of different elements and compounds found naturally and synthesized by humans. See compound, element.

a vital supply link relied upon by various industries

An element or a compound, produced by chemical reactions on a large scale for direct industrial and consumer use, or for reaction with other chemicals.

One cause for corrosion in pipes; chemicals that can cause corrosion include carbon dioxide, oxygen, hydrogen sulfide, hydrochloric acid, chloride, and sulfuric acid.

Refers to unpleasant smells or tastes from fermentation (often of sulfur or nail polish).

An artifact of fermentation that can create unpleasant smells and tastes - often of sulfur or nail polish.

A definite chemical flavor (such as formaldehyde) not to be confused with Rio flavor.

A descriptive term for a cheese aroma or flavor taint which usually indicates improper manufacturing or contamination with foreign materials.

a distinct chemical flavor.