🔍 Key Concepts

• Material Safety Data Sheet (MSDS) terminology for chemical hazards • Difference between a material that burns, poisons, detonates, or reacts on its own • Meaning of violently self‑reacts under normal conditions

💭 Think About

• On an MSDS, which term is used when a substance can react dangerously by itself without needing a spark or ignition source? • How is a material that burns when ignited different from one that can break down or react on its own and release a lot of energy? • Which choice best matches a hazard where the main issue is chemical instability rather than just burning or poisoning?

✅ Before You Answer

• Check which term is used on MSDSs for chemicals that may polymerize, decompose, or react strongly on their own • Distinguish between a substance that is simply flammable and one that can decompose or react violently without an external trigger • Make sure the word you pick matches the idea of self‑reaction under common storage or handling conditions, not just burning or toxicity.