Match and firework manufacturing: The safety match head is rubbed and turns into white phosphorus to ignite Pesticide synthesis: Raw materials for the production of organophosphorus pesticides such as dichlorvos and methamidophos Flame retardant: Added to polymer materials to enhance fire resistance Metallurgical industry: Manufacturing phosphor bronze (to enhance metal hardness) and deacidification of light metals Electronic materials: Semiconductor diffusion sources (such as phosphorus paper) Chemical intermediates: Production of phosphoric acid, phosphorus trichloride, phosphorus pentasulfide, etc https://www.emilcq.com/red-phosphorus