The two signal words used under the Globally Harmonized System (GHS) are "Danger" and "Warning."
- Danger is used for more severe hazards and indicates a higher level of risk associated with the chemical.
- Warning is used for less severe hazards and indicates a moderate level of risk.
Only one of these signal words appears on a label or Safety Data Sheet (SDS), never both simultaneously. The choice of signal word depends on the hazard classification of the chemical