Calcined Kaolin 325 Mesh Ceramic Grade

Calcined Kaolin 325 Mesh Ceramic Grade (CAS 92704-41-1, molecular formula Al2O3·2SiO2) is a raw material for tile, sanitaryware, tableware and refractory production, where particle size and impurity profile drive fired colour and body strength. China Chemicals supplies it at Al2O3 44% min in pack sizes from 1 kg through to 1000 kg Bulk Bag, so laboratory trial quantities and full production volumes can be sourced from the same specification.

It is also traded as Calcined China Clay, Metakaolin, Calcined Aluminium Silicate. Every consignment ships with a batch-specific Certificate of Analysis and the current Safety Data Sheet, and material is stored and picked under stock rotation so you receive product well inside its shelf life.

Typical applications

Body filler in ceramic tile and sanitaryware
Whiteness and opacity improvement in glaze
Extender pigment in paint and paper coating
Reinforcing filler in rubber and cable compound
Pozzolanic additive in high-performance concrete

Technical specification

Chemical name	Calcined Kaolin 325 Mesh Ceramic Grade
Synonyms	Calcined China Clay, Metakaolin, Calcined Aluminium Silicate
CAS number	92704-41-1
Molecular formula	Al2O3·2SiO2
Appearance	White fine powder
Al2O3	44.0% min
SiO2	52.0% max
Fe2O3	0.5% max
Loss on ignition	0.5% max
Particle size	99% through 325 mesh
Whiteness	88% min

Values above are typical and are confirmed on the Certificate of Analysis issued against each batch. Tighter specifications can be quoted where a process requires them.

Packaging and supply

Available in 1 kg, 5 kg, 25 kg Bag, 1000 kg Bulk Bag. Bulk, road tanker and export drum quantities are quoted on request, including FOB and CIF terms for international shipment. Pricing shown is per pack in USD, exclusive of freight and any applicable duties.

Handling and safety

Transport classification: Not regulated · May cause respiratory irritation as dust. Store in the original closed container in a cool, well-ventilated area away from incompatible materials, and handle using appropriate personal protective equipment. Read the Safety Data Sheet in full before use — it is issued with every order and is available on request before purchase.

Supply to industry only. Products are sold for legitimate industrial, laboratory and manufacturing use. We may request end-use details and business registration before releasing an order.