Silicon

Silicon (CAS 7440-21-3), commonly traded as silicon metal or Si, is a high-purity elemental material refined from quartz; a foundational raw material for metallurgical, chemical, and electronic manufacturing supply chains.

Where is Silicon used?

• Plastics and polymers: primary feedstock for silicone polymers such as fluids, elastomers, and sealants for automotive and construction
• Automotive: aluminum-silicon alloys for lightweight, high-strength castings in engine components and structural parts
• Electronics: ultra-high-purity wafers as substrate for semiconductors, solar cells, and integrated circuits
• Chemical synthesis: starting material for chlorosilanes and other organosilicon intermediates
• It functions primarily as a precursor for producing silicones, semiconductors, and aluminum alloys.

Good to know: Metallurgical grade (typically 98–99% Si) covers alloy and chemical synthesis applications, while semiconductor and solar grades are held to significantly tighter purity thresholds.

Commercial specifications

• Particle size and purity grade selected based on end-use requirements
• Metallurgical grade typically 98–99% Si
• Standard packaging ranges from bulk bags to drums