Pictogram

Pictograms let workers recognize hazards quickly, even when they do not read the language on the label. A flame signals fire hazards, a skull and crossbones signals severe acute toxicity, and a corrosion symbol signals skin and metal damage, for instance.

Each pictogram can apply to more than one hazard class, and a product can carry several at once. The pictograms shown are determined by the product's classification, and when two symbols would be redundant, rules specify which one takes priority. For example, a skull and crossbones takes precedence over the exclamation mark for the same toxicity hazard.

In the United States, OSHA's HazCom requires the black symbol on a white background inside a red diamond border. The environment pictogram is non-mandatory under OSHA because environmental hazards are outside its scope, though it may appear for other jurisdictions. Transport labels use a similar diamond shape but are a separate system with different symbols and colors.

Pictograms work together with the signal word, hazard statements, and precautionary statements. The symbol identifies the kind of hazard; the other elements explain what to do about it.

Do not confuse GHS pictograms with the colored diamond of NFPA 704, which communicates severity ratings for emergency responders.