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Fire Service Act Hazardous Material Determination (Category III)

Category III Hazardous substances in the Japanese Fire Service Act (spontaneously combustible substances and water-reactive substances, solids or liquids)

Substances that pose a hazard of spontaneous ignition when exposed to air, or substances that ignite or produce flammable gases in contact with water

Substances

Appended Table 1 given in the law (including items specified by a Cabinet Order)

Category Properties Overview of properties Item (including items specified by Cabinet Order)
Category III Spontaneously combustible substances and water-reactive substances Solids or liquids Substances that pose a hazard of spontaneous ignition when exposed to air, or substances that ignite or produce flammable gases in contact with water
  1. potassium
  2. sodium
  3. alkyl aluminum
  4. alkyl lithium
  5. yellow phosphorus
  6. alkali metal (excluding potassium and sodium) and alkaline earth metal
  7. organometallic compounds (excluding alkyl aluminum and alkyl lithium)
  8. metal hydrides
  9. metal phosphides
  10. calcium carbide or aluminum carbide
  11. Other substances specified by a Cabinet Order (i.e., silicon chloride)
  12. Substances containing any of those listed in the preceding items

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