Calcium chloride is an inorganic compound – a salt with the chemical formula CaCl2. It is white flakes or pellets at room temperature, and is highly soluble in water. Calcium chloride desiccants work well over a temperature range from freezing point up to 80 °C or more. Calcium chloride is the active compound in all Topdry products.
Calcium chloride is not hazardous to the environment but classified as H319 according to GHS (causes serious eye irritation).
Topdry uses calcium chloride as the absorbing agent in our desiccants due to its high efficiency compared to other types of desiccants, such as silica gel and clay desiccants.
Calcium chloride (CaCl2) absorbs moisture from the air effectively. It can attract several times its own weight in water, dissolving into liquid brine if the air is humid enough and the temperature is high enough. The liquid brine is mixed with a modified starch and thereby formed as a gel inside its packaging.