Calcium chloride has the formula CaCl₂, so there are twice as many chlorine atoms present as calcium atoms. MgCl₂ is the formula for magnesium chloride, which is a compound containing ...

The magnesium chloride product that sometime comes in a pet-safe formula, is the most expensive, and you may need to use more of it. "You know, the dogs, the cats are not going to get their paws ...