Tricalcium phosphate is a calcium salt of phosphoric acid with the chemical formula Ca3(PO4)2. It is also known as tribasic calcium phosphate and bone phosphate of lime.
It is a white solid of low solubility.

Tricalcium phosphate is used as an anti-caking agent in manufacturing and agriculture. Its widely available and inexpensive. These qualities, combined with its ability to separate materials, have made it popular around the world. Tricalcium phosphate is effective as a nutritional supplement because it is readily absorbed in the body. It is found in many household items, including baby powder, toothpaste, and antacids.