Wollastonite 325 Mesh Ceramic Grade

Wollastonite 325 Mesh Ceramic Grade (CAS 13983-17-0, molecular formula CaSiO3) 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 CaSiO3 95% 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 Calcium Metasilicate, Calcium Silicate, Tabular Spar. 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

Fast-fire tile body enabling shorter kiln cycles
Frit and glaze flux reducing firing shrinkage
Asbestos-free reinforcement in friction materials
Functional filler in paint and powder coating
Reinforcement in engineering plastics

Technical specification

Chemical name	Wollastonite 325 Mesh Ceramic Grade
Synonyms	Calcium Metasilicate, Calcium Silicate, Tabular Spar
CAS number	13983-17-0
Molecular formula	CaSiO3
Appearance	White acicular powder
CaSiO3	95.0% min
CaO	45 – 48%
SiO2	50 – 53%
Fe2O3	0.5% max
Aspect ratio	8:1 – 15:1
Loss on ignition	2.0% 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.