Silicagel Orange ( With Indicator ) - 500g

Silica Gel Orange – With Indicator

Other Names: Silica gel with moisture indicator, Orange silica gel, Indicating silica gel
Chemical Composition: Amorphous SiO₂ with moisture indicator (typically methyl violet or iron(III) salts)
CAS Number: 112926-00-8 (silica base)
Appearance: Orange beads or granules (turn green upon saturation with moisture)
Odor: Odorless

Silica gel orange is a desiccant composed of synthetic amorphous silica impregnated with a moisture-sensitive indicator. It is used to adsorb humidity and monitor moisture levels in closed environments, such as in packaging, storage containers, and analytical instrumentation.

Chemical and Physical Properties

• Density: ~0.75 g/cm³ (bulk density)

• Surface Area: 600–800 m²/g

• Pore Size: ~2.5 nm

• pH (suspension): 4–7

• Moisture Capacity: ~25–30% of its weight (at 100% relative humidity)

• Color Change: Orange (dry) → Green (moist/saturated)

Applications

• Humidity Control: Used to maintain dryness in packaging of electronics, instruments, and chemical goods.

• Air and Gas Drying: Applied in compressed air systems and desiccant air dryers.

• Analytical Labs: Used in desiccators and sample preservation containers.

• Monitoring Moisture Saturation: Visual color change provides immediate indication of moisture exposure.

Safety

Signal Word: ⚠️ Warning

Handling and Storage

• Handling: Avoid dust generation. Use appropriate PPE when handling large quantities.

• Storage: Keep in tightly sealed containers in a dry place. Avoid direct contact with water. Store away from acids and alkaline substances.

Environmental Considerations

Generally considered non-toxic to the environment in small quantities. Dispose of used silica gel according to local waste disposal regulations, especially if it contains metal-based indicators.