![]() ![]() It even protects expensive leather items like jackets, shoes, and boots. Drop some in your camera bag to protect your valuable camera equipment. Put in your toolboxes to protect your precious tools from rusting. At that time, it will need to be reactivated before it can be used again. Cobalt chloride is a common visual moisture indicator due to its distinct colour change when hydrated. When hydrated the colour changes to a light pink/purple. It prevents all forms of rust, corrosion, oxidation, mildew, fungus, mold, etc. When the silica gel has absorbed its full capacity of about 40 of its weight in water, the cobalt chloride crystals will turn white because of supersaturation. The deep blue colour of this moisture indicating silica gel is due to cobalt chloride. When used in closed places (where mold and fungus live and breed) silica gel whisks away moisture to create a protective environment of dry air. Dangers of cobalt chloride coated silica gel desiccant Silica gel is not considered very dangerous as per directive of FDA (USA). Our Indicating beads will turn from Yellow to Dark Green when the Silica Gel is about 60% absorbed with moisture. Silicon dioxide, also known as silica, is an oxide of silicon with the chemical formula SiO 2, most commonly found in nature as quartz. As a document 1 from the US National Parks Service indicates, the chief danger of cobalt chloride is its environmental toxicity if it enters soil or water through improper disposal. Our Indicating Silica Gel is reformulated to remove Cobalt Chloride (II) which provides our customers with a safe Indicating Silica Gel Packet to use. Suffice to say that orange silica gels were designed specifically to avoid the use of cobalt chloride, which is fairly toxic. As the gel begins to absorb water, the color changes to light blue and finally pink, when it has absorbed about 8 of its weight in moisture. ![]() The moisture color indicator is due to bright blue crystals of a heavy metal salt, cobalt chloride. Our Indicating Silica Gel Packets do NOT contain Cobalt Chloride (II) (Indicating Silica Gel that is usually blue in color which has been linked as being possibly carcinogenic to humans and been labeled as hazardous material in some countries). The bulk silica gel we have is an indicating type of silica gel. Silica Gel Desiccant 2 Gram Indicating Packet Silica gel is a desiccant, or drying agent, that manufacturers often place in little packets to keep moisture from damaging certain food and commercial products.
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