Hanson Chemicals

Fumed Silica

Formula: SiO₂
CAS Number: 112945-52-5
EC Number (EINECS): 231-545-4
HS Code: 28112200
UN Number: Not classified as hazardous for transport
IUPAC Name: Silicon Dioxide
Also Known As: Pyrogenic Silica; Synthetic Amorphous Silica
Molecular Weight, g/mol: 60.08

Typical Specifications

Appearance: White, fluffy powder
Odor: Odorless
Grades Available: Hydrophilic, Hydrophobic
Packaging: 10kg / 20kg bags, jumbo bags, customized

Applications / Uses

Primary Applications

  • Thickening, anti-caking, and thixotropic agent in coatings, paints, adhesives, and sealants

  • Reinforcing filler in silicone elastomers and rubbers

  • Used in pharmaceutical excipients as a glidant and tablet flow aid

Secondary Applications

  • Used in food industry as an anti-caking agent (E551)

  • Additive in plastics and composites for improved mechanical properties

  • Optical, electronics, and catalyst carrier applications

End Industries Served: Coatings, Adhesives, Sealants, Plastics, Rubber, Pharmaceuticals, Cosmetics, Food & Beverages, Electronics

Safety & Handling Information

Hazard Class (GHS): Not classified as hazardous; may cause mechanical irritation (dust)

Hazard Statements (H-Codes):

  • H319: Causes serious eye irritation

  • H335: May cause respiratory irritation (dust)

Precautionary Statements (P-Codes):

  • P280: Wear protective gloves/eye protection

  • P261: Avoid breathing dust

  • P305 + P351 + P338: IF IN EYES – rinse cautiously with water for several minutes

Storage Conditions

  • Store in a dry, cool, ventilated area

  • Keep packaging tightly closed to prevent moisture absorption

  • Handle under dust-control conditions

Transport Information

  • ADR/RID: Not classified as dangerous goods

  • IMDG: Not classified as dangerous goods

  • IATA: Not classified as dangerous goods

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