A gaseous form of a material which is normally a solid or liquid at STP;
becomes airborne through evaporation or sublimation.

Vinyl Chloride

Vapor Density

Volatile Organic Analysis

(Chemical Definition); Volatile Organic Compound:  Highly evaporative
organic compound; frequently found in paints, solvents, etc.; VOCs contribute
to the formation of smog.

(Legal Definition); Volative Organic Compound; Any organic compound which
participates in atmospheric photochemical reactions other than those exempted
by the administrator.

Volatile Organic Hazardous Air Pollutant

Vapor Pressure