Passage: Although some desiccants are chemically inert, others are extremely reactive and require specialized handling techniques.  The most common desiccant is silica, an otherwise inert, nontoxic, water-insoluble white solid.  Tens of thousands of tons are produced annually for this purpose.   Other common desiccants include activated charcoal, calcium sulfate, calcium chloride, and molecular sieves (typically, zeolites).

Question: What are some common desiccants?
activated charcoal, calcium sulfate, calcium chloride, and molecular sieves (typically, zeolites)