tri-Calcium phosphate is an inorganic salt supplied in pure quality with a minimum calcium content of 34 %. Ca for general laboratory chemical use. The empirical formula is Ca₃(PO₄)₂, density 3,14 g/cm³, CAS number 7758-87-4 and EG nr. 231-840-8. This provides a practical quantity for preparation of buffers, ceramic or biomaterial trials, nutritional studies and other inorganic synthesis or analytical routines that call for tricalcium phosphate. The pure grade supports reproducible weighing and dissolution steps without unnecessary formulation additives. Available from manufacturer Carl ROTH, the material fits standard chemical inventories where a defined calcium phosphate source is preferred over mixed bone-ash or food-grade alternatives. The compact plastic unit is straightforward to store and dispense on the bench while maintaining clear identity through the stated CAS and elemental calcium specification. This article is part of Inorganic salts, in Inorganic chemicals. Key features Assay (as Ca, based on calcinated substance): 34-40 % Iron (Fe): ≤0,05 % Loss on ignition: ≤8,0 % CAS number: 7758-87-4 Pack sizes: 100 g, 500 g, 1 kg, 5 kg EG nr.: 231-840-8 Empirical formula: Ca₃(PO₄)₂ Density: 3,14 g/cm³ Technical Information Sheet: Safety Data Sheet: