Scientific Name(S): Kaolin, hydrated aluminum silicate
Common Name(S): Heavy or light kaolin, China clay, bolus alba, porcelain clay, white bole, argilla
Source: Kaolin is a hydrated aluminum silicate. It is a naturally occurring clay that is prepared for pharmaceutical purposes by washing with water to remove sand and other impurities.
History: Kaolin has been used commercially and medicinally for hundreds of years. It is currently found in the manufacture of pottery, bricks, cement, plastering material, color lakes (insoluble dyes) and insulators. It is also used in pharmaceutical preparations as a filtering agent to clarify liquids. When applied topically, it serves as an emollient and drying agent. When ingested, it acts as an adsorbent to bind gastrointestinal toxins and to control diarrhea.
Kaolin has been added to dusting powders and is used as a tablet excipient. Kaolin is also utilized in a variety of automated laboratory chemistry tests, including the determination of activated coagulation time (ACT) and in the serodiagnosis of tuberculosis, using the kaolin agglutination test (KAT).
Uses of Kaolin
Kaolin is used internally to control diarrhea and topically as an emollient and drying agent.