Kaolinite

Kaolinite (CAS 1318-74-7, EC 215-286-4) is a naturally occurring aluminosilicate clay mineral supplied under trade names including Hydrite MP, Kaophile 2, Kaophobe 45, Mono 90, and 50R. It carries no assigned E-code and is classified within the Pigments and Colorants category for industrial supply purposes.

In pulp and paper manufacturing, kaolinite functions as a coating and filler pigment, improving sheet opacity and printability by controlling ink absorption at the fibre surface. In rubber compounding, it reinforces the polymer matrix and modifies flow behaviour during processing. In pharmaceutical and agricultural formulations, it acts as a rheology modifier, adjusting suspension viscosity and carrier consistency.

Kaolinite is available in multiple processed grades differing in particle size distribution and surface treatment, including hydrophobic variants such as Kaophobe 45. It falls under REACH registration requirements for EU supply. Packaging formats vary by grade and supplier; bulk, big-bag, and multi-wall sack options are standard across the market.