Description

Pyrophyllite is a naturally occurring hydrous aluminum silicate mineral valued for its unique combination of thermal stability, chemical inertness, and low thermal expansion. This makes it a critical functional filler and raw material across numerous high-temperature and refractory industries. Key sectors that rely on its properties include ceramics, refractories, paints & coatings, and polymer composites. We supply high-purity Pyrophyllite CAS NO 141040-74-6 to meet the stringent demands of global industrial applications.

Application

• Refractory Products: As a key component in firebricks, castables, and insulating materials due to its high melting point and volume stability at elevated temperatures.
• Ceramics & Porcelain: Used in the body and glaze formulations for sanitaryware, tiles, and technical ceramics to improve thermal shock resistance and reduce firing shrinkage.
• Paints & Coatings: Acts as an extender and functional filler to enhance durability, weather resistance, and sheen control.
• Polymer Composites: Serves as a reinforcing filler in plastics and rubber to improve dimensional stability, heat resistance, and mechanical properties.
• Foundry & Metalcasting: Employed in mold and core washes to improve surface finish and casting release.
• Construction Materials: Incorporated into fiber-cement boards, joint compounds, and sealants for its fire-retardant and reinforcing qualities.
• Carrier & Adsorbent: Utilized in agricultural products (e.g., pesticide carriers) and as an adsorbent in various filtration processes.

Basic Information

Product Name	Pyrophyllite
CAS No.	141040-74-6
Molecular Formula	Al2Si4O10(OH)2
Molecular Weight	360.31 g/mol
Synonyms	Agalmatolite; Pyrauxite; Mineral T; Pagodite; Wonderstone; Pyrophyllite Clay; Hydrated Aluminum Silicate; Aluminum Silicate Hydroxide
EINECS	Contact for details

Quality Control

Our Pyrophyllite is sourced and processed under strict quality protocols to ensure batch-to-batch consistency and performance. Quality is verified through a series of tests including chemical composition analysis, particle size distribution, and loss on ignition. Certificates of Analysis (COA) are available upon request to support your quality assurance and regulatory compliance needs.

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 when not in use to minimize exposure to atmospheric moisture.

Specification

Item	Specification
Appearance	White to off-white powder
Assay (as Al2O3 + SiO2)	≥ 85.0 %
Loss on Ignition (LOI)	4.0 - 7.0 %
Particle Size (D50)	Customizable (e.g., 5-45 µm)
pH (in aqueous suspension)	6.0 - 8.0
Moisture Content	≤ 2.0 %
Bulk Density	Contact for details

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