Moisture is a common enemy of electronics, causing corrosion and malfunction. One of its prominent uses is in the protection of electronic devices and equipment, and especially when desiccators or tank vent dryers are used. Indicating silica gel finds its application in various industries. The cobalt chloride is a deep-blue color when dry and transitions from blue to pink as the desiccant saturates.īlue silica gel can be used in many of the same applications as orange silica gel however, due to the addition of the moisture indicator (cobalt chloride), blue silica gel should not be used in direct contact with products intended for consumption, such as food or pharmaceuticals. Two types of indicating silica gel: Orange and blueīlue Indicating Silica Gel - MIL-D-3716 Type IV Grade H BLUE INDICATING SILICA GELīlue indicating silica gel is a bead or granule that has been washed with a concentration of cobalt chloride (a heavy metal salt). This visible change serves as an effective moisture detection mechanism, providing a clear visual indication of when the silica gel needs to be replaced or recharged.Ĭonversely, non-indicating desiccant forms do not provide a way to determine saturation level, resulting in added difficulty when evaluating the amount of moisture adsorbed by the desiccant. These indicators, typically either cobalt chloride or methyl violet, change color as the silica gel saturates with moisture. Unlike regular silica gel (known as bulk, or non-indicating silica gel), indicating silica gel is enhanced with color-changing indicators. Its primary role is to adsorb moisture, preventing it from damaging the surrounding environment or products.įor more information about desiccants, AGM has you covered! Indicating Silica Gel Desiccant: What Makes It Different? Silica gel is available in different types and sizes, making it a versatile desiccant capable of application across a wide range of industries. Silica gel consists of silicon dioxide and is shaped as small, porous beads. Silica gel is a desiccant known for its great moisture-adsorbing capabilities. That's where indicating silica gel comes into play. Whether it's electronic devices, foods, pharmaceuticals, or sensitive materials like artwork and optics assemblies, excess moisture can lead to damage and deterioration. Moisture control is a critical factor in preserving the quality and longevity of various products.
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