Heating the material above 120☌ will also reduce the adsorption capacity and destroy the impregnated colour change indicator. Cobalt chloride is a moisture indicator that is dark blue when dry and pink when saturated with water. The adsorption capacity of Envirogel can be destroyed by contamination with dust, grease or petroleum products. Eating cobalt chloride-coated silica gel will likely cause nausea and vomiting. Please contact us for the specific reactivation procedure. Orange indicator is classified as non toxic, avoiding to use the common blue silica gel including cobalt chloride as indicator (cobalt chloride is. This in turn, reduces the adsorption capacity of the material. However, caution should be taken to keep the product. However, after several reactivation cycles the material may disintegrate into powder. Rest assured, the contents of the packet, silica gel, is basically sand and it is not harmful if swallowed. Due to link between the cancer and cobalt chloride, it has been forbidden in Europe for use. Also, the uniform bead size reduces gas flow channelling and minimizes pressure drop.Įnvirogel may be reactivated for re-use by heating. This will cause the gel to be blue when dry and pink when hydrated. Envirogel is capable of adsorbing up to approximately 30% of its own weight of water from the surrounding atmosphere at 50% RH and 25☌.Įnvirogel is produced in the beaded form and has a high dust attrition resistance. The beads are impregnated with a safe organic indicator which changes colour as the desiccant becomes saturated. Envirogel indicates an orange/yellow colour when active and changes to green when the desiccant becomes saturated.Īs with non-indicating silica gel, the material is a refined form of silica which is produced by the reaction of a mineral acid, usually sulphuric, and a sodium silicate solution. Blue silica gel contains cobalt chloride, rendering it unsuitable for use with food products. We do not recommend reactivation of these packets. Note: Only orange silica gel can be used with food products. Our Cobalt Chloride FREE indicating Silica Gel beads will turn from Orange to Dark Green when the Silica Gel is about 60 absorbed with moisture. Envirogel desiccant is the latest alternative to blue (cobalt chloride) indicating silica gel. Our indicating Silica Gel does NOTcontain Cobalt Chloride (II) (normally Blue or Pink Silica Gel) which is classified as a IARC Group 2B carcinogen.
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