Description

Kaolin CAS NO 1332-58-7 is a naturally occurring hydrated aluminum silicate clay mineral, valued for its whiteness, fine particle size, and chemical inertness. Its primary commercial value lies in its versatility as a functional filler, extender, and rheology modifier across numerous industries. Key industrial users include manufacturers in the paper, ceramics, paints & coatings, plastics, rubber, and pharmaceuticals sectors, where it enhances product properties such as opacity, strength, and smoothness.

Application

• Paper Manufacturing: Used as a coating and filler to improve brightness, opacity, gloss, and printability of paper products.
• Ceramics & Refractories: A fundamental raw material in the production of porcelain, sanitaryware, tiles, and high-temperature refractory linings, providing plasticity and strength.
• Paints, Coatings & Inks: Acts as an extender pigment and flatting agent to improve suspension, durability, and sheen control.
• Plastics & Rubber: Serves as a reinforcing filler to enhance mechanical properties, dimensional stability, and electrical resistance in compounds.
• Pharmaceuticals & Cosmetics: Utilized as an adsorbent, diluent, and opacifying agent in tablets, powders, and topical preparations like lotions and masks.
• Adhesives & Sealants: Improves viscosity, bonding strength, and resistance to sagging.
• Agriculture: Employed as a carrier in pesticides and fertilizers and as a soil conditioner.
• Food Industry (FCC Grade): Used as an anti-caking agent and processing aid where food-grade specifications are met.

Basic Information

Product Name	Kaolin
CAS No.	1332-58-7
Molecular Formula	Al2Si2O5(OH)4 or Al2O3·2SiO2·2H2O
Molecular Weight	258.16 g/mol
Synonyms	China Clay; Hydrated Aluminum Silicate; Bolus Alba; Porcelain Clay; White Clay; Argilla; E559; CI 77004; Aluminum Silicate Hydrate
EINECS	310-194-1

Quality Control

Our Kaolin is produced and tested under a stringent quality management system to ensure batch-to-batch consistency and compliance with relevant industry specifications. We offer various grades, including Industrial, Technical, and high-purity USP/NF or FCC grades for specialized applications. A comprehensive Certificate of Analysis (COA) detailing purity, physical parameters, and impurity levels is provided with every shipment to guarantee product integrity and support your quality assurance protocols.

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). This product is hygroscopic (moisture-sensitive); containers must be kept tightly sealed after opening to prevent caking and degradation of properties due to moisture absorption.

Specification

Item	Specification
Appearance	White to off-white fine powder
Identification (IR)	Conforms
Assay (as Al2O3)	36.0 - 39.5 %
Loss on Drying (105°C)	≤ 2.0 %
pH (10% slurry)	4.0 - 7.0
Residue on Sieve (325 mesh)	≤ 0.5 %
Heavy Metals (as Pb)	≤ 20 ppm
Arsenic (As)	≤ 3 ppm
Lead (Pb)	≤ 10 ppm

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