84880

Silicon dioxide

purum p.a., acid purified

• Synonym(s): Cristobalite, Quartz, Sand, Silica
• Linear Formula: SiO₂
• CAS Number: 60676-86-0
• Molecular Weight: 60.08
• MDL number: MFCD00011232
• UNSPSC Code: 12352303
• PubChem Substance ID: 329769325
• NACRES: NA.21

Properties

• grade: purum p.a.
• form: powder or crystals
• quality: acid purified
• loss: ≤0.1% loss on ignition
• refractive index: n20/D 1.544 (lit.)
• particle size: 40-200 mesh
• mp: 1610 °C (lit.)
• density: 2.6 g/mL at 25 °C (lit.)
• anion traces: chloride (Cl^-): ≤200 mg/kg
• cation traces: Ca: ≤50 mg/kg; Cd: ≤50 mg/kg; Co: ≤50 mg/kg; Cu: ≤50 mg/kg; Fe: ≤100 mg/kg; K: ≤100 mg/kg; Na: ≤200 mg/kg; Ni: ≤50 mg/kg; Pb: ≤50 mg/kg; Zn: ≤50 mg/kg
• SMILES string: O=[Si]=O
• InChI: 1S/O2Si/c1-3-2
• InChI key: VYPSYNLAJGMNEJ-UHFFFAOYSA-N

Description

General description

Silicon dioxide is one of the important constituents of sedimentary rock bauxite, basalt fibers and ceramic fibers. It is added to cement for improving the hydraulic properties of cement.

may contain dark particles

Application

Silicon dioxide may be employed in the preparation of calcium silicide.

Safety Information

• Storage Class Code: 11 - Combustible Solids
• WGK: nwg
• Flash Point(F): Not applicable
• Flash Point(C): Not applicable