On a bulk chemical carrier, water should NOT be used as an extinguishing agent to fight a fire if the water may come into contact with which chemical?
• Water-reactive chemicals and what happens when water contacts them • Difference between flammable liquids and corrosive / reactive acids in fire-fighting • Guidance from chemical data sheets (MSDS) on firefighting media for dangerous cargoes
• Which of these chemicals is known to react violently or dangerously with water, possibly releasing heat or toxic gases? • For each option, ask: is water usually listed as an acceptable extinguishing medium, or is it specifically prohibited? • Think about which substance is a very strong dehydrating/sulfonating agent that can generate a lot of heat when mixed with water.
• For each choice, mentally check: "Does this chemical react with water, or is it just flammable?" • Consider which substance is associated with sulfuric acid and becomes very dangerous when diluted improperly with water. • Verify in reference materials or MSDS which cargo specifically says: "Do NOT use water" or "Keep water away" for fire-fighting.
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