Kaolin, also called china clay, is a soft white clay that is an essential ingredient in the manufacture of china and porcelain and is widely used in the making of paper, rubber, paint, and many other products. It is used as extenders and additives in adhesives, coatings, inks, plastics, rubber and coatings.


Molar Weight258.16 g/mol
Melting Point1750 °C
Density2.16–2.68 g/cc
FormsGrey, Powder, White, Yellow, Odourless

Uses and Applications

Key applications

  • Printing & Inks
  • Filler
  • Coatings
  • Absorbent
  • Ceramics
  • Adhesives and Sealants
  • Opacifier
  • Cosmetic products
  • Paint and Coatings
  • Rubber


  • Pharma
  • Coatings & Construction
  • Polymers
  • Cosmetics
  • Lubricants
  • Rubber

Synonyms: Aluminum silica hydroxide, Aluminum Silicate Hydrous, China Clay, Hydrous Aluminum Silicate, Anhydrol

Chemical Formula: Al2(OH)4Si2O5

CAS Number: 1332-58-7