Silica Gel

White silica gel granules are a common desiccant used for moisture control. Here™s a general specification for white silica gel granules: Physical Properties: Appearance: White, spherical or irregular granules. Size: Typically available in 1-5 mm diameter granules. Bulk Density: 700-800 kg/m³. Porosity: High, with a pore volume of about 0.35-0.40 cm³/g. Surface Area: Approximately 600-800 m²/g. Chemical Composition: SiO (Silicon Dioxide): Over 97% by weight. NaO (Sodium Oxide): Less than 0.5%. FeO (Iron Oxide): Less than 0.02%. Moisture Content: Typically less than 5% (as packed). Absorption Capacity: Relative Humidity at 20%: About 10-15% of its weight. Relative Humidity at 50%: About 25-30% of its weight. Relative Humidity at 90%: Up to 35-40% of its weight. pH Value: Typically neutral, around 6.5 to 7.5. Other Specifications: Thermal Stability: Can withstand temperatures up to 120C without significant degradation. Regeneration: Can be regenerated by heating at 100-120C. Dust Content: Typically less than 0.2%. Applications: Used in packaging to control moisture. Desiccant in various industrial applications. Moisture absorber in electronics, pharmaceuticals, and food packaging.