Calcined Alumina 99.5% Ceramic Grade

Calcined Alumina 99.5% Ceramic Grade (CAS 1344-28-1, molecular formula Al2O3) 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 99.5% 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 Aluminium Oxide, Corundum, Alpha Alumina. 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

Technical and electrical ceramic manufacture
Refractory brick and monolithic castable production
Grinding media and wear-resistant liners
Spark plug and substrate manufacture
Polishing compound and abrasive production

Technical specification

Chemical name	Calcined Alumina 99.5% Ceramic Grade
Synonyms	Aluminium Oxide, Corundum, Alpha Alumina
CAS number	1344-28-1
Molecular formula	Al2O3
Appearance	White fine crystalline powder
Al2O3	99.5% min
Na2O	0.3% max
SiO2	0.05% max
Fe2O3	0.03% max
Particle size D50	3 – 5 µm
Loss on ignition	0.3% max

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.