Health hazard; Material that on very short exposure could cause death or major residual injury; Materiais that on short exposure could cause serious temporary or residual injury; MateriaIs that on intense or continued but not chronic exposure could cause temporary incapacitation or possible residual injury; Material that on exposure would cause irritation but only minor residual injury; Material that on exposure under tire conditions would offer no hazard beyond that of ordinary combustible material; Flammability; Materiais that wiII rapidly or completely vaporize at atmospheric pressure and normal ambient temperature, or that are readily dispersed in air and that wiII burn readily; Liquids and solids that can be ignited under almost all ambient temperature conditions; Material that must be moderately heated or exposed to relatively high ambient temperatures before ignition can occur; Material that must be preheated before ignition can occur. Material that will not burn. Reacteactivity/Stablity; Material that in themselves are readily capable of detonation or of explosive decomposition or reaction at normal temperatures and pressures; Material that in themselves are capable of detonation or explosive decomposition or reaction but require a strong initiating source or which must be heated under continement before initiation or which react explosively with water; Materiais that readily undergo violent chemical change at elevated temperatures and pressures or which react violently with water or which may form explosive mixtures with water; Materiais that in themselves are normally stable, but which can become unstable at elevated temperatures and pressures; Material that in themselves are normally stable, even under tire exposure conditions, and which are not reactive with water.