- ▸ Glass flux: Alumina and alkali source that lowers melting temperature in glass batches.
- ▸ Ceramics: Flux and alumina source for bodies and glazes.
- ▸ Functional filler: Low-iron extender for paints, coatings and plastics.
- ▸ Adhesives: Extending filler in adhesive systems.
A grade-specific Safety Data Sheet (SDS) — with the complete hazard classification, handling precautions, and transport information — is supplied with every shipment and available on request. Confirm all safety and regulatory details against the SDS for your specific grade.
Request SDS →Nepheline syenite (CAS 37244-96-5) is a quartz-free sodium-potassium aluminosilicate rock, processed to a feldspar-nepheline mineral powder rich in alumina and alkalis and low in iron. It is used as a fluxing raw material in glass manufacturing and in ceramic bodies and glazes, where it supplies alumina and alkali and lowers fusion temperature. The fine, low-iron grades also serve as a functional filler and extender in paints, coatings, plastics and adhesives.
Frequently Asked Questions
What is nepheline syenite used for?
Nepheline syenite (CAS 37244-96-5) is a quartz-free sodium-potassium aluminosilicate used as a fluxing raw material in glass batches and in ceramic bodies and glazes, where it supplies alumina and alkali and lowers fusion temperature. Fine, low-iron grades also serve as a functional filler and extender in paints, coatings, plastics, and adhesives. RawSource supplies it in bulk.
What is the composition and formula of nepheline syenite?
It is a feldspar-nepheline mineral rich in alumina and alkalis and low in iron, with the representative formula Al2KNaO8Si2. Its quartz-free, low-iron character is what makes it valued as a glass/ceramic flux and as a filler.
Where is nepheline syenite found?
It is a naturally occurring igneous rock mined from specific deposits and then processed to a controlled mineral powder. Sourcing and grade vary by deposit; RawSource supplies processed, specification-controlled material with a Certificate of Analysis.
What is the HS code for nepheline syenite?
It classifies under HS 2529.30 — leucite; nepheline and nepheline syenite. Verify the destination tariff line with your customs broker; commercial and origin documentation accompanies each bulk shipment.
What is the cost of bulk nepheline syenite?
Bulk pricing depends on grade, particle size, iron content, packaging, and volume. Request a quote from RawSource with your target grade and quantity (bags, super sacks, or bulk) for current pricing and a CoA.