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Description

Silicon dioxide ( CAS 112945-52-5 ), commercially known as synthetic amorphous silica or fumed silica, is a high-purity, engineered form of silica produced through vapor-phase hydrolysis. Unlike crystalline or precipitated grades, this material is manufactured specifically to deliver controlled rheology modification, anti-settling, and foam suppression across demanding industrial formulations. In coatings and adhesives, it functions as a thixotropic agent, preventing sagging in applied films and controlling flow in sealants and structural adhesives for industrial use. Personal care formulators incorporate it to adjust texture, improve powder flowability, and stabilize emulsions in products such as sunscreens and pressed cosmetics for consumers. Lubricant manufacturers use it as a thickener in grease formulations and as a reinforcing filler where thermal stability under load is required for heavy machinery applications. In plastics and polymer processing, it acts as an anti-blocking agent in film extrusion and supports stabilization of pigment dispersions in masterbatches during the manufacturing process. Synthetic amorphous silica is supplied as a low-bulk-density white powder, with hydrophilic and hydrophobic surface-treated variants available to suit aqueous or solvent-based systems. Standard grades include food-grade ( FCC compliant) and technical grades, with surface area specifications typically used to differentiate reinforcing versus flow-aid applications. Contact us for supply of Silicon dioxide Request Quote

Other Names (Synonyms)

Synthetic amorphous silica | Silica | Silica, amorphous, fumed, cryst.-free | Dioxosilane | Fumed silica

Key Technical Features

  • High Purity Grade standard
  • Consistent Batch Quality
  • Full Regulatory & REACH Support
  • Global Logistics Network enabled

Physical Properties

Melting Point>1600°C
Density2.3 lb/cu.ft at 25 °C (bulk density)(lit.)
AppearanceAmorphous silica, the noncrystalline form of SiO2, is a transparent to gray, odorless, amorphous powder
Formpowder
Refractive Indexn 20/D 1.46(lit.)

Safety & Handling

Warning
GHS07· IrritantGHS08· Health Hazard

Hazard Statements

H315Causes skin irritation
H319Causes serious eye irritation
H320Causes eye irritation
H335May cause respiratory irritation
H341Suspected of causing genetic defects
H350May cause cancer
H372Causes damage to organs through prolonged or repeated exposure
H373May causes damage to organs through prolonged or repeated exposure

Precautionary Statements

P203Obtain, consult and follow expert instructions for use.
P260Do not breathe dust/fume/gas/mist/vapours/spray.
P261Avoid breathing dust/fume/gas/mist/vapours/spray.
P264Wash … thoroughly after handling.
P270Do not eat, drink or smoke when using this product.
P271Use only outdoors or in a well-ventilated area.
P280Wear protective gloves/protective clothing/eye protection/face protection.
P318IF exposed or concerned, get medical advice.
P319Get medical advice/attention if you feel unwell.
P321Specific treatment (see … on this label).
P405Store locked up.
P501Dispose of contents/container in accordance with local regulations.
P265Wash … thoroughly after handling.
P352IF ON SKIN: Wash with plenty of water.
P340IF INHALED: Remove person to fresh air and keep comfortable for breathing.
P317Get emergency medical help.
P317If eye irritation persists: Get medical advice/attention. Get emergency medical help.
P364Take off contaminated clothing and wash it before reuse.
P233Store in a well-ventilated place. Keep container tightly closed.
P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.

Trade & Regulatory

HS Code28112290
Storage Class13 - Non Combustible Solids
WGK (Germany)2