Only the soluble forms of coconut oil soap are used, usually the sodium and potassium salts. These are characterized by rapid solubility and ready sudsing. They generally make up only a portion of the soap base of toilet bars, light duty soap flakes and granules, and all purpose soap granules. The remainder of the soap base is derived from tallow and similar fats.  There is very limited distribution of bar soap for use in hard water in which the base is 100% sodium coconut oil soap.