Silicon Dioxide
| Formula: | SiO₂ |
| CAS Number: | 7631-86-9 |
| EC Number (EINECS): | 231-545-4 |
| HS Code: | 28112200 |
| UN Number: | Not classified as dangerous |
| IUPAC Name: | Silicon Dioxide |
| Also Known As: | Silica; Quartz; Fumed Silica |
| Molecular Weight, g/mol: | 60.08 |
Typical Specifications
| Appearance: | White, amorphous powder |
| Odor: | Odorless |
| Melting Point, °C: | 1610 |
| Boiling Point, °C: | Sublimes at 2230 |
| Solubility: | Insoluble in water |
| Purity, %: | ≥99.5 |
| Grades Available: | Fumed, Precipitated, Colloidal |
| Packaging: | 25kg bags, 500kg jumbo bags, bulk |
Applications / Uses
Primary Applications
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Used as a reinforcing agent in rubber and plastics
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Key ingredient in paints, coatings, and adhesives
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Filler in sealants and putty
Secondary Applications
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Food additive (anti-caking agent, E551)
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Pharmaceutical excipient
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Cosmetic formulations for absorbency and texture
End Industries Served: Polymers, Plastics, Rubber, Paints & Coatings, Adhesives, Food & Beverages, Pharmaceuticals, Cosmetics
Safety & Handling Information
Hazard Class (GHS): Not classified as hazardous; inhalation of fine dust may cause respiratory irritation
Hazard Statements (H-Codes):
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H335: May cause respiratory irritation (inhalation of dust)
Precautionary Statements (P-Codes):
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P261: Avoid breathing dust
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P280: Wear protective gloves/eye protection
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P304 + P340: IF INHALED – move person to fresh air and keep comfortable for breathing
Storage Conditions
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Store in a cool, dry, well-ventilated place
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Protect from moisture and contamination
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Keep container tightly closed
Transport Information
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ADR/RID: Not classified as dangerous goods
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IMDG: Not classified as dangerous goods
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IATA: Not classified as dangerous goods