215619

Silicon

powder, −325 mesh, 99% trace metals basis

• Linear Formula: Si
• CAS Number: 7440-21-3
• Molecular Weight: 28.09
• EC Number: 231-130-8
• MDL number: MFCD00085311
• UNSPSC Code: 12141911
• PubChem Substance ID: 24852908
• NACRES: NA.23

Properties

• Quality Level: 100
• Assay: 99% trace metals basis
• form: powder
• particle size: −325 mesh
• bp: 2355 °C (lit.)
• mp: 1410 °C (lit.)
• density: 2.33 g/mL at 25 °C (lit.)
• SMILES string: [Si]
• InChI: 1S/Si
• InChI key: XUIMIQQOPSSXEZ-UHFFFAOYSA-N

Description

General description

Silicon powder is a fine, gray powder. This silicon powder has been passed through a 325-mesh screen, meaning that the particles are small enough to pass through a sieve with openings that are approximately 44 thousandths of an inch in diameter. Silicon is a chemical element and is a hard, brittle, metallic-gray solid that is highly resistant to chemical attack and has a high melting point. Silicon is the second most abundant element in the Earth’s crust and is found in a variety of minerals.

Application

Silicon can be used as anode material in lithium-ion batteries.

It can be used to fabricate Al₂O₃-C refractories. The silicon powder generates β-Sialon whiskers which imparts high-temperature strength, slag resistance and thermal shock resistance of the refractories.

It can be incorporated into high-densitypolyethylene (HDPE) polymer composites. The addition of silicon powder enhancesthermal stability and thermal conductivity of composites.

Safety Information

• Pictograms: GHS02
• Signal Word: Warning
• Hazard Statements: H228
• Precautionary Statements: P210 - P240 - P241 - P280 - P370 + P378
• Hazard Classifications: Flam. Sol. 2
• Storage Class Code: 4.1B - Flammable solid hazardous materials
• WGK: WGK 3
• Flash Point(F): Not applicable
• Flash Point(C): Not applicable
• Personal Protective Equipment: dust mask type N95 (US), Eyeshields, Gloves