IUPAC Name: Tricalcium diphosphate
Molecular Formula: Ca₃O₈P₂
Molecular Weight: 310.18 g/mol
Canonical SMILES: P([O-])([O-])(=O)[O-].P(=O)([O-])([O-])[O-].[Ca+2].[Ca+2].[Ca+2]
InChI: InChI=1/3Ca.2H3O4P/c;;;2*1-5(2,3)4/h;;;2*(H3,1,2,3,4)/q3*+2;;/p-6
EINECS: 231-840-8
Classification Code: Biocompatible Materials
Product Categories: Inorganics; Food & Flavor Additives; 20: Ca; Biocompatible CeramicsMaterials Science; Biocompatible / Biodegradable Materials; Materials Science; Nanomaterials; Nanoparticles: Oxides, Nitrides, and Other CeramicsNanomaterials; Nanopowders and Nanoparticle Dispersions
H-Bond Acceptor: 8
Exact Mass: 309.794614
MonoIsotopic Mass: 309.794614
Topological Polar Surface Area: 173
Heavy Atom Count: 13
Complexity: 36.8
Refractive index: 1.63
Density: 3.14 g/cm³
Melting Point: 1670 °C
Storage temperature: 2-8 °C
Boiling Point: 158 °C at 760 mmHg
Water Solubility of Tricalcium Phosphate (CAS NO.7758-87-4): 0.1 g/L (25 °C) 

 Tricalcium Phosphate (CAS NO.7758-87-4) is used in baking as a, with E number E341. It is also used in cheese products. It is used in a variety of dental products for remineralization and as a diluent in some medications where it will give the tablet a grey colour in the absence of additional colouring agents.Another practical application of the compound is its use in gene transfection of cells. It is not too well understood, but the Tricalcium Phosphate precipitate and DNA form a complex that is thought to help the DNA enter the cell.

Hazard Codes: Xi
Risk Statements: 36/37/38 
R36/37/38: Irritating to eyes, respiratory system and skin.
Safety Statements: 26-36-24/25-22 
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. 
S36: Wear suitable protective clothing. 
S24/25: Avoid contact with skin and eyes. 
S22: Do not breathe dust.
WGK Germany of Tricalcium Phosphate (CAS NO.7758-87-4): 3

 Tricalcium Phosphate (CAS NO.7758-87-4), its Synonyms are Calcium orthophosphate ; Calcium phosphate, tribasic ; Phosphoric acid, calcium salt (2:3) ; Synthos ; Calcigenol simple ; Calcium orthophosphate, tri-(tert) ; Calcium phosphate ; Calcium phosphate (Ca3(PO4)2) ; Calcium tertiary phosphate ; Natural whitlockite ;Tertiary calcium phosphate ; Tribasic calcium phosphate ; Tricalcium diphosphate ; Tricalcium bis(orthophosphate), with a fluorine content of less than 0,005 % by weight on the dry anhydrous product . It is white powder.