Tricalcium ste (sometimes abbreviated TCP) is a calcium salt of sric acid with the chemical formula Ca3(PO4)2. It is also known as tribasic calcium ste and bone ste of lime (BPL). It is a white solid of low solubility. Tricalcium ste is used in powdered spices as an anticaking agent, e.g. to prevent table salt from caking. The calcium stes have been assigned European food additive E341.