Description

Silicon28 CAS NO 14276-58-5 is a high-purity, stable isotope of silicon, specifically the silicon-28 (28Si) nuclide. This material is critical for applications requiring extreme isotopic purity to eliminate spectral interferences and ensure precise measurements. It is primarily utilized in advanced scientific research, semiconductor metrology, and the development of next-generation quantum computing and optical standards.

Application

• Primary Standard for Avogadro Constant: Used in the international Avogadro project to redefine the kilogram through the creation of a perfect silicon-28 sphere.
• Quantum Information Science: Serves as a host material for spin qubits, enabling research into scalable quantum computing architectures.
• High-Resolution Spectroscopy: Provides an ultra-pure substrate and reference material in FTIR and Raman spectroscopy to achieve unmatched spectral clarity.
• Semiconductor Industry Metrology: Used in the calibration of equipment and as a reference wafer for measuring lattice parameters and impurity concentrations with extreme accuracy.
• Fundamental Physics Research: Essential for experiments testing fundamental constants, nuclear properties, and precision particle physics.
• Optical and Electronic Grade Crystals: Feedstock for growing single crystals with defined isotopic composition for specialized optoelectronic devices.

Basic Information

Product Name	Silicon28
CAS No.	14276-58-5
Molecular Formula	Si
Molecular Weight	27.97693 g/mol
Synonyms	Silicon-28; 28Si; Silicon, isotope of mass 28; Stable Silicon-28; Silicon 28 isotope; Monoisotopic Silicon; Avogadro Silicon; High-Purity Silicon-28; Isotopically Enriched Silicon
EINECS	Contact for details

Quality Control

Our Silicon28 is produced and handled under stringent cleanroom conditions to ensure the highest isotopic and chemical purity. Each batch is characterized using state-of-the-art analytical techniques, including High-Resolution Inductively Coupled Plasma Mass Spectrometry (HR-ICP-MS) and Gas Mass Spectrometry, to verify isotopic enrichment levels and trace metallic impurities. A comprehensive Certificate of Analysis (COA) detailing isotopic abundance, elemental impurities, and physical form is provided with every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and clean environment at a controlled room temperature (15-25°C). To prevent surface contamination, storage under an inert atmosphere (e.g., argon or nitrogen) in a dedicated cleanroom cabinet is recommended for long-term preservation of ultra-high purity.

Specification

Item	Specification
Isotopic Enrichment (28Si)	> 99.99%
Identification (IR)	Conforms
Total Metallic Impurities	< 1 ppm
Carbon (C) Content	< 0.5 ppm
Oxygen (O) Content	< 1 ppm
Physical Form	Polycrystalline pieces, rod, or specified wafer
Surface Cleanliness	Particle-free, specified cleaning protocol available

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.