Reactivity (Yellow)

Susceptibility of Material to Burning

  • Material that in itself is normally stable, even under fire exposure conditions, and is not reactive with water.
  • Material that in itself is normally stable, but which can become unstable at elevated temperatures and pressures.
  • Material that readily undergoes violent chemical change at elevated temperatures and pressures or which reacts violently with water or which may form explosive mixtures with water.
  • Material that in itself is capable of detonation or explosive decomposition or reaction but requires a strong initiating source or which must be heated under confinement before initiation or which reacts explosively with water.
  • Material that in itself is readily capable of detonation or of explosive decomposition or reaction at normal temperatures and pressures.
Yellow Reactivity Sign