List of Combustible Metals or Metal Compounds:
If your laboratory contains combustible metals or combustible metal compounds, you will need to have a type D fire extinguisher.
In the event of a fire, types A, B, and C fire extinguishing agents will react with combustible metals. Therefore, unique agents such as potassium and sodium are used in type D fire extinguishers to put out fires with combustible metals.
The following is a list of combustible metals that require a type D fire extinguisher:
aluminum phosphide | lithium borohydride | potassium-sodium alloys |
Bulk pieces of these metals are typically difficult to ignite; their finely divided forms readily burn. Finely divided forms are regarded as pyrophoric and water-reactive substances to varying degrees. They include dusts, powders, chips, turnings, flakes, punching, borings, ribbons and shaving.
Pyrophoric is substance that will ignite spontaneously in air.
SOURCE : CHEMISTRY OF HAZARDOUS MATERIAL, 4th EDITION, 2005
Prepared by:
Safety and Health Division, Department of Development and Asset Management, UPSI
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