Silicon - ≥99% metals basis, powder,−325 mesh , CAS No.7440-21-3

CAS: 7440-21-3 Cat. No.: S434690 Formula: Si Molecular Weight: 28.09 EC Number: 231-130-8 PubChem CID: 5461123

GRADE & PURITY ≥99% metals basis, powder,−325 mesh

Synonyms

Silicon, rod, 100mm, diameter 2.0mm, crystalline, 100% | NSC 5519 | Silane, 7.0 - 7.5% in argon | Silicon Hollow Cathode Lamp: 1.5' Diameter, 2-pin, Non-Coded | Silicon plate, 12.5mm (0.5in) thick | Silicon powder (amorphous) | Silicon lump, 10cm (3.9in)

Storage

Room temperature

Shipped In

FedEx DG Service

Specifications

Synonyms

Silicon, rod, 100mm, diameter 2.0mm, crystalline, 100% | NSC 5519 | Silane, 7.0 - 7.5% in argon | Silicon Hollow Cathode Lamp: 1.5' Diameter, 2-pin, Non-Coded | Silicon plate, 12.5mm (0.5in) thick | Silicon powder (amorphous) | Silicon lump, 10cm (3.9in)

Specifications & Purity

≥99% metals basis, powder,−325 mesh

Storage

Room temperature

Shipped In

FedEx DG Service

Purity

≥99% metals basis

Names and Identifiers

• Pubchem Sid: 488195551
• Pubchem Sid Url: https://pubchem.ncbi.nlm.nih.gov/substance/488195551
• Canonical Smiles: [Si]
• IUPAC Name: silicon
• InChIKey: XUIMIQQOPSSXEZ-UHFFFAOYSA-N
• INCHI: 1S/Si
• Isomeric SMILES: [Si]
• WGK Germany: 2
• RTECS: VW0400000
• PubChem CID: 5461123
• Molecular Weight: 28.09

Taxonomic Classification

Taxonomy Tree

• Kingdom Inorganic compounds
  • Superclass Homogeneous metal compounds
    • Class Homogeneous metalloid compounds

• Kingdom: Inorganic compounds
• Superclass: Homogeneous metal compounds
• Class: Homogeneous metalloid compounds
• Subclass: Not available
• Intermediate Tree Nodes: Not available
• Direct Parent: Homogeneous metalloid compounds
• Alternative Parents: Not available
• Molecular Framework: Not available
• Substituents: Homogeneous metalloid
• Description: This compound belongs to the class of inorganic compounds known as homogeneous metalloid compounds. These are inorganic compounds containing only metal atoms,with the largest atom being a metalloid atom.
• External Descriptors: nonmetal atom - carbon group element atom

Data sources

1. Djoumbou Feunang Y, Eisner R, Knox C, Chepelev L, Hastings J, Owen G, Fahy E, Steinbeck C, Subramanian S, Bolton E, Greiner R, and Wishart DS. ClassyFire: Automated Chemical Classification With A Comprehensive, Computable Taxonomy. Journal of Cheminformatics, 2016, 8:61.

DOI: 10.1186/s13321-016-0174-y

Chemical and Physical Properties

• Boil Point(°C): 2355°C
• Melt Point(°C): 1410°C
• Molecular Weight: 28.085 g/mol
• Hydrogen Bond Donor Count: 0
• Hydrogen Bond Acceptor Count: 0
• Rotatable Bond Count: 0
• Exact Mass: 27.9769 Da
• Monoisotopic Mass: 27.9769 Da
• Topological Polar Surface Area: 0.000 Ų
• Heavy Atom Count: 1
• Formal Charge: 0
• Complexity: 0.000
• Isotope Atom Count: 0
• Defined Atom Stereocenter Count: 0
• Undefined Atom Stereocenter Count: 0
• Defined Bond Stereocenter Count: 0
• Undefined Bond Stereocenter Count: 0
• The total count of all stereochemical bonds: 0
• Covalently-Bonded Unit Count: 1

XLogP3

Frequently Asked Questions

What does the trace-metals specification mean?

This product is specified at ≥99% on a trace-metals basis. That figure describes metallic impurity content rather than overall chemical assay, so it is the relevant specification for ICP-MS, semiconductor and battery applications. Lot-specific values are stated on the Certificate of Analysis.

How should this product be stored?

Store at room temperature.

How is this product shipped?

This product is classified as dangerous goods and ships via FedEx DG Service. Ground and other economy services are not available, and delivery to some destinations or address types may be restricted.

What are the CAS number, molecular formula and molecular weight?

The CAS Number is 7440-21-3, the molecular formula is Si, and the molecular weight is 28.09 g/mol. InChIKey XUIMIQQOPSSXEZ-UHFFFAOYSA-N.

What documentation is provided?

Available product documentation, including Certificates of Analysis (COA), Safety Data Sheets (SDS), and specification sheets, is shown in the product document area. Document availability and access follow the current site policy.