Mark hazardous materials with standard symbols so users know to handle them with care. These labels come with stickers that have GHS pictograms, which were designed by the UN to clearly identify chemicals as flammable, toxic, corrosive, and more. Add any stickers that apply to your chemical, then write in the type of material, a description of the risks, and your emergency contact information. These labels also have a National Fire Protection Association (NFPA) diamond, which uses colors, numbers, and abbreviations to help first responders recognize hazards at a glance.

Danger labels indicate an extreme, immediate hazard that will result in death or serious injury if not avoided. Warning labels indicate a moderate hazard that may result in death or serious injury if not avoided.