A substance having a flash point at or above 100 Fahrenheit up to and including 150 Fahrenheit, according to the Consumer Product Safety Commission. The Occupational Safety and Health Administration defines a combustible liquid as having a flashpoint at or above 100 Fahrenheit but below 200 Fahrenheit.
According to the DOT and NFPA, combustible liquids are those having a flash point at or above 100 degrees Fahrenheit (38 degrees Celcius), or liquids that will burn. They do not ignite as easily as flammable liquids. However, combustible liquids can be ignited under certain circumstances, and must be handled with caution. Substances, such as wood, paper, etc., are termed "Ordinary Combustibles."
Able to catch on fire and burn. The National Fire Protection Association and the U.S. Department of Transporation generally define a "combustible liquid" as having a flash point of l00 degrees F (37.8 degrees C) or higher (see Flash Point).
Capable of burning, generally in air under normal conditions of ambient temperature and pressure, unless otherwise specified. Combustion can occur in cases where an oxidizer other than the oxygen in air is present, e.g., chlorine, fluorine, or chemicals containing oxygen in their structure.
In general, materials that will burn are called combustibles. A combustible liquid has a flash point greater than 37.6oC (100oF) but less than 93.3oC (200oF). A flammable liquid has a flash point below 37.6oC (100oF). Since flammable liquids have flash points close to or below room temperature (16 to 25oC) they are considered more hazardous than combustible liquids.
For liquids, a liquid with a flash point above 100°F (37.8°C) but below 200°F (93.3°C). Non-liquid substances such as wood and paper are classified as "ordinary combustibles" by NFPA. Also see Flammable Liquid.
A term used to classify certain liquids that will burn on the basis of flash points. Both the National Fire Protection Association (NFPA) and the Department of Transportation (DOT) define “combustible liquids” as having a flash point of 100oF (37.8oC) or higher. See also “Flammable”.