Description

Aluminum Silicate CAS NO 12428-46-5 is a versatile inorganic compound widely utilized as a functional filler and performance additive. Its value lies in its ability to enhance mechanical properties, thermal stability, and chemical resistance in composite materials. This product is essential for manufacturers in the plastics, rubber, coatings, and ceramics industries seeking to improve product durability and processing characteristics.

Application

• Plastics & Polymer Compounding: Acts as a reinforcing filler to improve stiffness, dimensional stability, and heat resistance in polyolefins, PVC, and engineering plastics.
• Rubber Industry: Used as an inert extender and reinforcing agent in various rubber goods, including tires, hoses, and seals, to enhance abrasion resistance.
• Paints & Coatings: Serves as a functional pigment and extender to improve film integrity, scrub resistance, and weatherability while controlling gloss.
• Ceramics & Refractories: A key raw material in the formulation of ceramic bodies, glazes, and refractory bricks, contributing to structural integrity and high-temperature performance.
• Adhesives & Sealants: Imparts thixotropy, improves bonding strength, and reduces shrinkage in various adhesive and sealant formulations.
• Paper Coating: Used as a coating pigment to enhance paper smoothness, opacity, ink receptivity, and print quality.

Basic Information

Product Name	Aluminum Silicate
CAS No.	12428-46-5
Molecular Formula	Al2O9Si3 (Typical for Kaolin) / Variable
Molecular Weight	Variable (Contact for details)
Synonyms	Aluminium silicate; Kaolin; China clay; Hydrated aluminum silicate; Porcelain clay; Aluminum silicon oxide; Anhydrous aluminum silicate; E554
EINECS	235-253-8 (for Kaolin)

Quality Control

Our Aluminum Silicate is produced under a stringent quality management system. Each batch undergoes rigorous testing for critical parameters such as chemical composition, particle size distribution, brightness, and moisture content to ensure consistency and performance. Certificates of Analysis (COA) are provided with every shipment and are available upon request.

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 to prevent moisture absorption (hygroscopic). Separate from strong acids and strong oxidizing agents.

Specification

Item	Specification
Appearance	White to off-white powder
Identification (IR)	Conforms
Assay (as Al2O3)	≥ 35.0 %
SiO2 Content	≥ 45.0 %
Loss on Drying (105°C)	≤ 2.0 %
Particle Size (D50)	1.0 - 10.0 µm
pH (10% slurry)	4.5 - 7.5
Heavy Metals (as Pb)	≤ 20 ppm

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