The potential of a substance to exert a harmful effect on humans or animals and a description of the effect and the conditions or concentration under which the effect takes place. The commercial name or trademark by which a chemical is known. One chemical may have a variety of trade names depending on the manufacturers or distributorsinvolved. The difference between the LEL and the UEL constitutes the flammable range or explosive range of a substance. That is, if the LEL is 1ppm and the UEL is 5ppm, then the explosive range of the chemical is 1ppm to 5ppm.
Vapors evaporate into the air from liquids such as solvents.
Solvents with low boiling points will evaporate. The pressure that a solid or liquid exerts when it is in equilibrium with its vapor at a given temperature. A chemical that reacts with water to release a gas that is either flammable or presents a health hazard.