
Silica Gel Self-Indicating Blue
Self-indicating Blue Silica Gel is a moisture-absorbing desiccant that changes color from blue to pink as it becomes saturated with water, providing a visual indication of humidity exposure.
Chemical Identification:
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Main Component: Amorphous Silicon Dioxide (SiO₂·xH₂O)
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Indicator: Cobalt(II) chloride (provides blue color)
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CAS Number:
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Silica Gel: 7631-86-9
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Cobalt(II) chloride: 7646-79-9
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Synonyms:
Self-indicating silica gel, Blue desiccant, Color-changing silica gel


Uses:
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Desiccant in packaging of electronics, pharmaceuticals, instruments, and foods
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Humidity indicator in lab and storage containers
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Used in drying tubes and moisture control systems in chemical labs
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Reusable after drying (e.g., heating at ~120°C)
Key Features:
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Blue when dry, turns pink when saturated
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Porous, granular or bead form
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High surface area for efficient moisture adsorption
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Visually indicates the need for regeneration
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CP/technical grade, not for ingestion or direct contact with food
SDS (Short Summary):
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Hazard Classification:
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Contains Cobalt(II) chloride, a suspected carcinogen and reproductive toxin
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Signal Word: Warning
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Hazard Statements:
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H302: Harmful if swallowed
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H317: May cause allergic skin reaction
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H351: Suspected of causing cancer
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H361: Suspected of damaging fertility or the unborn child
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Precautions:
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Avoid dust generation and direct contact
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Use gloves and wash hands after handling
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Store in tightly sealed containers in a dry area
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Weight | N/A |
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size | 500g, 2KG |
Q & A
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