NFPA 704 placards are built to communicate hazard severity at a glance, not chemical identity. The diamond uses color‑coded sections with numbers 0–4 to show how hazardous a material is in three categories—health, flammability, and reactivity—along with a white area for any special hazards. This lets responders quickly gauge risk, decide on isolation and PPE, and coordinate a response based on how dangerous the material could be, without needing to know the exact chemical name. The chemical name is not shown on the placard. That identity is typically found on the shipping papers, label, or the material safety data sheet (SDS). So while the placard tells you about potential hazards and their levels (the hazard ratings), it does not reveal the chemical’s name. The placard may also omit product naming entirely, since its purpose is hazard communication rather than identification. In practice, you use the placard to assess risk immediately and then consult accompanying documents for the exact material identity.