Monocalcium phosphate

Monocalcium phosphate
Names
	IUPAC name Calcium bis(dihydrogen phosphate)
	Other names Acid calcium phosphate; Calcium acid phosphate; Calcium diorthophosphate; Calcium biphosphate; Calcium superphosphate; Monobasic calcium phosphate; Monocalcium orthophosphate; Phosphoric acid, calcium salt (2:1)
Identifiers
CAS Number	7758-23-8 ; 10031-30-8 (monohydrate) ;
3D model (JSmol)	Interactive image;
ChemSpider	22862 ;
ECHA InfoCard	100.028.943
E number	E341(i) (antioxidants, ...)
PubChem CID	24454;
UNII	701EKV9RMN ; 0N4E6L5449 (monohydrate) ;
CompTox Dashboard (EPA)	DTXSID2044262 ;
	InChI InChI=1S/Ca.2H3O4P/c;21-5(2,3)4/h;2(H3,1,2,3,4)/q+2;;/p-2 Key: YYRMJZQKEFZXMX-UHFFFAOYSA-L ; InChI=1/Ca.2H3O4P/c;21-5(2,3)4/h;2(H3,1,2,3,4)/q+2;;/p-2 Key: YYRMJZQKEFZXMX-NUQVWONBAY;
	SMILES OP(=O)(O)[O-].OP(=O)(O)[O-].[Ca+2];
Properties
Chemical formula	CaH4P2O8
Molar mass	234.05 g/mol
Appearance	White powder
Density	2.220 g/cm3
Melting point	109 °C (228 °F; 382 K)
Boiling point	203 °C (397 °F; 476 K) (decomposes)
Solubility in water	2 g/100 mL
Refractive index (nD)	1.5176
Structure
Crystal structure	Triclinic
Hazards
NFPA 704 (fire diamond)	1 0 0
Flash point	Non-flammable
Related compounds
Other anions	Calcium pyrophosphate
Other cations	Magnesium phosphate; Dicalcium phosphate; Tricalcium phosphate; Strontium phosphate
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Monocalcium phosphate is an inorganic compound with the chemical formula Ca(H₂PO₄)₂ ("AMCP" or "CMP-A" for anhydrous monocalcium phosphate). It is commonly found as the monohydrate ("MCP" or "MCP-M"), Ca(H₂PO₄)₂·H₂O. Both salts are colourless solids. They are used mainly as superphosphate fertilizers and are also popular leavening agents.

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