Description

Nepheline (Alna(Sio4)) is a tectosilicate mineral and a key source of alumina and alkali, valued for its role as a high-performance, low-temperature flux in ceramic and glass manufacturing. Its primary commercial importance lies in reducing energy consumption and lowering production costs by significantly decreasing the melting temperature of raw material batches. This product is essential for manufacturers in the glass, ceramics, and construction industries seeking to improve product quality and operational efficiency. CAS No. 12251-27-3.

Application

• As a primary flux in the production of container glass, fiberglass, and specialty glass, lowering melting temperatures and improving chemical resistance.
• A key raw material in ceramic glazes, frits, and sanitaryware bodies to enhance vitrification and surface finish.
• Used as an alumina and alkali source in glass-ceramics and abrasives manufacturing.
• As a functional filler and extender in paints, coatings, and polymers to modify rheology and improve durability.
• In the production of refractory materials and insulating bricks.
• As a soil conditioner and source of soluble silica and potassium in specialized agricultural applications.
• Potential use as a raw material in the synthesis of zeolites and other aluminosilicate compounds.

Basic Information

Product Name	Nepheline (Alna(Sio4))
CAS No.	12251-27-3
Molecular Formula	Typically represented as (Na,K)AlSiO₄
Molecular Weight	~142.05 g/mol (for NaAlSiO₄ end-member)
Synonyms	Nepheline; Nephelite; Nepheline Syenite (rock form); Elaeolite; Sodium Potassium Aluminum Silicate; (Na,K)AlSiO₄; Alna(Sio4)
EINECS	235-540-4

Quality Control

Our Nepheline products are sourced and processed to meet stringent quality parameters for industrial applications. Quality is assured through rigorous in-process and batch testing for key parameters such as chemical composition, particle size distribution, and impurity content. We are committed to consistent supply reliability and traceability. Certificates of Analysis (COA) detailing lot-specific results are available upon request.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Keep the container tightly sealed to prevent moisture absorption and contamination from other materials. Store away from incompatible substances.

Specification

Item	Specification
Appearance	White to greyish powder or granules
Identification (XRD)	Complies
Assay (as Al₂O₃ + Na₂O + K₂O + SiO₂)	≥ 98.0 %
Alumina (Al₂O₃) Content	Contact for details
Silica (SiO₂) Content	Contact for details
Sodium Oxide (Na₂O) Content	Contact for details
Potassium Oxide (K₂O) Content	Contact for details
Iron Oxide (Fe₂O₃)	≤ 0.1 %
Loss on Ignition (LOI)	≤ 1.0 %
Particle Size (D50)	Customizable

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.