Some chemical manufacturers also use color codes on labels and/or caps to indicate health, physical, and chemical hazards. These colors can be used as a guide for storage groups store same colors together, segregate from other colors. Unfortunately, the color schemes are not always consistent among manufacturers. Under most schemes, colors convey the following message:

Red Fire Hazard and/or Flammables
White Contact Hazard and/or Corrosive (acids or bases)
Blue Health Hazard and/or Toxic or Poisonous
Yellow Reactivity Hazard and/or Oxidizers
Green, Gray or Orange Moderate or slight hazard (general chemical storage)
Striped or “Stop” Exceptions within the same color code labels (example – yellow label chemicals are stored apart from striped yellow label chemicals)