Description

Chalcedony CAS NO 14639-89-5 is a microcrystalline variety of quartz, prized for its fine-grained structure and unique physical properties. This material is essential for applications requiring high durability, chemical inertness, and a smooth, consistent surface finish. It serves as a critical raw material for manufacturers in the ceramics, precision optics, and advanced material synthesis industries, where consistent quality and reliable supply are paramount.

Application

• Ceramic & Refractory Production: Used as a high-silica component to enhance thermal shock resistance and structural integrity in kiln furniture and specialized linings.
• Precision Optics & Lapping: Serves as a superior abrasive and polishing agent for lenses, optical components, and semiconductor wafers due to its controlled particle size and hardness.
• Advanced Composite Materials: Acts as a functional filler to improve the mechanical strength, wear resistance, and dimensional stability of polymer and epoxy composites.
• Decorative Stone & Lapidary: A key material for crafting ornamental objects, jewelry, and architectural inlays, valued for its aesthetic appeal and workability.
• Foundry & Metal Casting: Employed in investment casting processes and as a molding sand additive to create precise, high-quality metal castings.
• Filtration Media: Utilized in water treatment and industrial filtration systems as a support bed or filter aid, leveraging its chemical stability and porosity.

Basic Information

Product Name	Chalcedony
CAS No.	14639-89-5
Molecular Formula	SiO₂
Molecular Weight	60.08 g/mol
Synonyms	Microcrystalline Quartz; Cryptocrystalline Silica; Agate (variety); Flint (variety); Jasper (variety); Onyx (variety); Siliceous Sinter; Hydrated Silica (impure forms)
EINECS	Contact for details

Quality Control

Our Chalcedony is subject to stringent quality control protocols to ensure batch-to-batch consistency and performance. We adhere to relevant industrial material standards, with key parameters including particle size distribution, chemical purity (SiO₂ content), and crystalline phase identification. A Certificate of Analysis (COA) detailing these specifications is provided with every shipment to guarantee compliance with your technical requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Keep the container sealed to prevent moisture absorption and contamination from dust or other particulates.

Specification

Item	Specification
Appearance	Fine white to off-white powder or granules
Identification (XRD)	Complies (Characteristic of Chalcedony/Quartz)
Assay (SiO₂ Content)	≥ 98.0 %
Loss on Drying	≤ 2.0 %
Particle Size (D50)	Customizable (e.g., 5 µm, 50 µm, 200 mesh)
Heavy Metals (as Pb)	≤ 20 ppm

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