building unless combined with another material that reduces the flammability of those materials. Important characteristics Flash point A material's flash point is a metric of how easy it is to ignite the vapor of the material as it evaporates into the atmosphere. A lower flash point indicates higher flammability. Materials with flash points below are regulated in the United States by OSHA as potential workplace hazards. Vapor pressure The vapor pressure of a liquid, which varies with its temperature, is a measure of how much the vapor of the liquid tends to concentrate in the surrounding atmosphere as the liquid evaporates. Vapor pressure is a major determinant of the flash point, with higher vapor pressures leading to lower flash points and higher flammability. See also Explosive material Fire Fire test Fire protection Active fire protection Passive fire protection Flammable liquids Flammable limit Underwriters Laboratories Notes References External links Videos showing flammability of cables based on jacket rating Fire Performance of Ageing Cable Compounds, NFPA Treatise by Dr. Perry Marteny Fire Testing Laboratory CAN4-S114 CAN/ULC-S114 Abstract iBMB/TU Braunschweig Governmental Lab for Testing Building Materials BAM Abstract and Picture of Noncombustibility Test in Progress ASTM E136 Standard Test Method for Behavior of Materials in a Vertical Tube Furnace at 750°C abstract "Combustible Dust: Agricultural Related Fires and Explosions Increasing, but Preventable" Division of Occupational Safety and Health, N.C. Department of Labor Combustible Dust: A Major Hot Work Hazard" Division of Occupational Safety and Health, N.C. Department of Labor Fire protection Fire prevention Thermodynamics Explosion protection