Linked from
The 10 pages that link to Calcium chloride, each with the reason it gives.
DeliquescenceBroader topic: It deliquesces at much lower humidity than sodium chloride.
RennetRelated: Added calcium can support aggregation after rennet destabilizes casein micelles.
Silica gelCompared with: Unlike silica gel, it can dissolve into brine as it takes up water.
DesiccantBroader topic: It is used in moisture absorbers for enclosed spaces and shipping.
Road saltCompared with: It can work at lower temperatures than sodium chloride but costs more.
Pickled cucumberRelated: It can help preserve crispness in cucumber pickles.