Bleaching clay also has the ability to absorb unpleasant odors, including those produced by ammonia, sulfurs, and tars. Manufacturers commonly use this compound to filter the impurities from petroleum products, ranging from food grade oil to jet fuels. Combined with salt water, these earth clays are commonly used as a lubricant for drilling oil. Some manufacturers use the clay substance as an ingredient in beauty products as well, and attapulgite is a constituent of some antidiarrheal medications.