Description

Aluminum Silicate CAS NO 12141-46-7 is an inorganic compound widely recognized for its versatility as a functional filler, extender, and reinforcing agent. Its value lies in its ability to enhance mechanical properties, improve thermal stability, and provide cost-effective bulking in various formulations. This product is essential for manufacturers in the paints & coatings, plastics, rubber, ceramics, and construction materials industries seeking to optimize product performance and production economics.

Application

• As a reinforcing filler and extender in rubber and thermoplastic/thermoset plastics to improve hardness and dimensional stability.
• As an opacifying agent and flatting agent in industrial paints, coatings, and primers.
• As a key ingredient in the production of ceramic bodies, glazes, and refractory materials.
• As a functional filler in adhesives, sealants, and caulks to modify viscosity and sag resistance.
• In the paper industry as a coating pigment to improve printability and brightness.
• As an anti-caking and free-flow agent in various industrial powders and formulations.
• In construction materials such as cement, grouts, and joint compounds for improved workability and durability.

Basic Information

Product Name	Aluminum Silicate
CAS No.	12141-46-7
Molecular Formula	Al2O3·SiO2 (variable ratios)
Molecular Weight	Varies by composition
Synonyms	Aluminium silicate; Kaolin, calcined; Metakaolin; Anhydrous aluminum silicate; Aluminum silicon oxide; Porcelain clay (calcined); China clay (processed); Aluminosilicate
EINECS	235-253-8

Quality Control

Our Aluminum Silicate is produced under a stringent quality management system to ensure batch-to-batch consistency and performance reliability. Each lot is tested against key parameters including chemical composition, particle size distribution, and loss on ignition. While we offer standard industrial and ceramic grades, production can be aligned with specific customer requirements. A Certificate of Analysis (COA) is provided with every shipment.

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 tightly sealed when not in use to minimize moisture absorption from the atmosphere, as the material is slightly hygroscopic. Separate from strong acids and strong bases.

Specification

Item	Specification
Appearance	White to off-white fine powder
Identification (XRD/IR)	Conforms
Assay (as Al2O3 + SiO2)	≥ 98.0 %
Loss on Ignition (LOI)	≤ 1.5 %
Particle Size (D50)	1.0 - 10.0 µm (Grade dependent)
pH (10% slurry)	5.0 - 8.0
Moisture Content	≤ 1.0 %
Heavy Metals (as Pb)	≤ 20 ppm

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