Description

Silicon Dioxide is a versatile inorganic compound, also known as silica, which serves as a fundamental material across numerous high-value industries. Its exceptional properties, including high thermal stability, chemical inertness, and controllable particle size, make it indispensable for enhancing product performance and process efficiency. Key industrial buyers in sectors such as pharmaceuticals, food & beverage, electronics, and advanced composites rely on high-purity grades of this material for applications ranging from flow aids and anti-caking agents to critical fillers and polishing agents.

Application

• Pharmaceuticals: Used as a glidant and anti-caking agent in tablet manufacturing to improve powder flow and as a thickening agent in semi-solid preparations.
• Food & Beverage: Employed as an anti-caking agent (E551) in powdered food products like spices, milk powder, and instant drink mixes to maintain free-flowing properties.
• Electronics & Semiconductors: Critical in chemical-mechanical planarization (CMP) slurries for polishing silicon wafers and as a filler in electronic encapsulants.
• Coatings & Paints: Acts as a matting agent, anti-settling agent, and rheology modifier to improve durability and application properties.
• Adhesives & Sealants: Serves as a reinforcing filler to enhance tensile strength, tear resistance, and viscosity control.
• Personal Care & Cosmetics: Used as an absorbent, viscosity increasing agent, and gentle abrasive in products like toothpaste, foundations, and powders.
• Plastics & Composites: Functions as a reinforcing filler to improve mechanical strength, thermal stability, and dimensional stability of polymer compounds.
• Chemical Production: Utilized as a catalyst support, desiccant, and as a raw material in the production of silicates and other silicon-based compounds.

Basic Information

Product Name	Silicon Dioxide
CAS No.	7631-86-9
Molecular Formula	SiO₂
Molecular Weight	60.08 g/mol
Synonyms	Silica; Amorphous Silica; Fumed Silica; Precipitated Silica; Colloidal Silicon Dioxide; Quartz (crystalline form); Cristobalite; Diatomaceous Earth; Silicic Anhydride; Cab-O-Sil®; Aerosil®; Food Additive E551
EINECS	231-545-4

Quality Control

Our Silicon Dioxide is manufactured under strict quality management systems to ensure batch-to-batch consistency and compliance with relevant pharmacopeial and food-grade standards. We provide comprehensive quality documentation, including Certificates of Analysis (COA) that detail parameters such as assay, loss on drying, heavy metal content, and particle size distribution. Specific grades are produced to meet standards including USP-NF, Ph. Eur., FCC, and ISO, with customization available to align with your proprietary specifications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). This material is hygroscopic (moisture-sensitive); ensure containers are sealed after each use to prevent moisture absorption and caking. Keep away from strong acids and strong alkalis.

Specification

Item	Specification
Appearance	White, fine powder
Identification (IR)	Conforms
Assay (as SiO₂)	≥ 98.0 %
Loss on Drying	≤ 5.0 %
pH (in aqueous suspension)	3.5 - 7.5
Heavy Metals (as Pb)	≤ 10 ppm
Arsenic (As)	≤ 3 ppm
Lead (Pb)	≤ 5 ppm
Particle Size (D50)	Contact for details
Surface Area (BET)	Contact for details

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