Finely divided calcium is flammable; however, bulk calcium is not.
Calcium's flammability depends on its form. In bulk form, it is not flammable. However, when calcium is finely divided into a powder, it becomes flammable and highly reactive. This finely divided calcium can react with air, moist air, and water.
Here's a breakdown:
- Bulk Calcium: Not flammable under normal conditions.
- Finely Divided Calcium: Flammable and reactive.
If finely divided calcium catches fire, the recommended extinguishing agents are dry chemical, soda ash, lime, or sand. Do NOT use water, CO2, or foam as these can exacerbate the fire and produce poisonous gases.
In summary, the answer to "Is calcium flammable?" is conditional. Bulk calcium is not, but finely divided calcium is flammable and presents a significant fire hazard.
