22. Labeling – haz-mats must be labeled with their Identity & Hazards . Hazard Labels – color coded & rated. Red = Fire Blue = Health Yellow = Reactivity or Instability White = Specific hazard (i.e. COR, ACID, etc.) Ratings - 0 to 4 0 = no hazard 1 = slight 2 = moderate 3 = serious 4=extreme hazard