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Colloidal Silica Aerosil 200 Original for Catalysts, Resins - 1000g = 20L
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Description
Colloidal Silica – Aerosil® 200
Other Names: Fumed Silica, Pyrogenic Silica
CAS Number: 112945-52-5
Chemical Formula: SiO₂
Molar Mass: 60.08 g/mol
Appearance: White, amorphous, fluffy powder
Aerosil® 200 is a highly pure, colloidal fumed silica with a specific surface area of approximately 200 m²/g. It is widely used as a rheology control additive and thickening agent in various chemical systems due to its large surface area and thixotropic properties.
Chemical and Physical Properties
Density: ~2.2 g/cm³ (bulk density ~50 g/L)
Melting Point: >1600°C
Solubility in Water: Insoluble
Surface Area: ~200 m²/g (BET)
pH (4% aqueous dispersion): 3.7–4.5
Odor: Odorless
Applications
Catalysts: Used as a carrier and support for catalytic systems.
Resins and Composites: Enhances mechanical properties and thixotropy.
Paints and Coatings: Prevents sagging and settling; improves consistency.
Plastics and Rubber: Reinforcing filler in silicone and other elastomers.
Adhesives and Sealants: Controls viscosity and flow properties.
Safety
Signal Word: Warning
H350 (12.6%): May cause cancer [Danger Carcinogenicity]
H372 (46%): Causes damage to organs through prolonged or repeated exposure [Danger Specific target organ toxicity, repeated exposure]
H373 (29.4%): May causes damage to organs through prolonged or repeated exposure [Warning Specific target organ toxicity, repeated exposure]
P203, P260, P264, P270, P280, P318, P319, P405, and P501
Handling and Storage
Storage Conditions: Store in tightly sealed containers in a dry, cool, and well-ventilated location.
Handling Precautions: Avoid creating dust. Use local exhaust ventilation and appropriate PPE.