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Silicagel Orange ( With Indicator ) - 1000g
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Description
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
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Density: ~0.75 g/cm³ (bulk density)
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Surface Area: 600–800 m²/g
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Pore Size: ~2.5 nm
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pH (suspension): 4–7
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Moisture Capacity: ~25–30% of its weight (at 100% relative humidity)
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Color Change: Orange (dry) → Green (moist/saturated)
Applications
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Humidity Control: Used to maintain dryness in packaging of electronics, instruments, and chemical goods.
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Air and Gas Drying: Applied in compressed air systems and desiccant air dryers.
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Analytical Labs: Used in desiccators and sample preservation containers.
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Monitoring Moisture Saturation: Visual color change provides immediate indication of moisture exposure.
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
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Handling: Avoid dust generation. Use appropriate PPE when handling large quantities.
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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.