Product Overview

Silica Gel Self-Indicating Orange 2-5 mm (CAS No. 112926-00-8) is a porous amorphous silica desiccant supplied as 2-5 mm particles with a moisture-responsive orange indicator system. Its drying function arises from physical adsorption of water onto silanol-rich internal surfaces rather than chemical conversion of silica itself. The visual indicator provides a practical means of observing moisture loading, while the stated orange colour does not disclose the composition or concentration of the indicator.

The 2-5 mm self-indicating form is intended for laboratory desiccation and humidity-control applications requiring granules of defined macroscopic size and visual condition monitoring. Its particle dimensions support straightforward containment in desiccant chambers, cartridges and storage systems.

Typical Applications

• Laboratory desiccators and moisture-controlled storage enclosures.
• Visual monitoring of desiccant condition during moisture uptake.
• Protection of moisture-sensitive reagents, components and instruments.
• Desiccant cartridges and packed drying systems compatible with 2-5 mm particles.
• Humidity control in sample-storage and packaging studies.
• General laboratory investigation of adsorption and desiccation behaviour.

Common Synonyms

• Orange indicating silica gel
• Self-indicating silica gel
• Indicating silica gel
• Amorphous silica gel
• Silica gel

Storage Conditions

Keep unused silica gel tightly sealed from ambient humidity to preserve initial adsorption capacity and indicator state. Protect from liquid contamination, dust and volatile substances that can occupy the porous surface or interfere with reliable visual indication.