Tripotassium phosphate

Tripotassium phosphate
	; Unit cell of tripotassium phosphate.
Names
	IUPAC name Potassium phosphate
	Systematic IUPAC name Potassium tetraoxidophosphate(3−)
	Other names Potassium phosphate, tribasic
Identifiers
CAS Number	7778-53-2 ;
3D model (JSmol)	Interactive image;
ChEBI	CHEBI:190301;
ChemSpider	56408 ;
ECHA InfoCard	100.029.006
EC Number	231-907-1;
E number	E340(iii) (antioxidants, ...)
PubChem CID	62657;
UNII	16D59922JU ;
CompTox Dashboard (EPA)	DTXSID3043994 ;
	InChI InChI=1S/3K.H3O4P/c;;;1-5(2,3)4/h;;;(H3,1,2,3,4)/q3*+1;/p-3 Key: LWIHDJKSTIGBAC-UHFFFAOYSA-K ;
	SMILES [K+].[K+].[K+].[O-]P([O-])([O-])=O;
Properties
Chemical formula	K3PO4
Molar mass	212.27 g/mol
Appearance	White deliquescent powder
Density	2.564 g/cm3 (17 °C)
Melting point	1,380 °C (2,520 °F; 1,650 K)
Solubility in water	90 g/100 mL (20 °C)
Solubility in ethanol	Insoluble
Basicity (pKb)	1.6
Structure
Crystal structure	Primitive orthorhombic
Space group	Pnma, No. 62
Lattice constant	a = 1.123772 nm, b = 0.810461 nm, c = 0.592271 nm
Hazards
	Occupational safety and health (OHS/OSH):
Main hazards	Irritant
	GHS labelling:
Pictograms
Signal word	Warning
Hazard statements	H319
Precautionary statements	P264, P280, P305+P351+P338, P337+P313
NFPA 704 (fire diamond)	2 0 0
Flash point	Non-flammable
Safety data sheet (SDS)	MSDS
Related compounds
Other cations	Trisodium phosphate; Triammonium phosphate; Tricalcium phosphate
Related compounds	Monopotassium phosphate; Dipotassium 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

Tripotassium phosphate, also called tribasic potassium phosphate^[3] is a water-soluble salt with the chemical formula K₃PO₄^.(H₂O)_x (x = 0, 3, 7, 9).^[4] Tripotassium phosphate is basic.

^ ^a ^b Voronin, V. I.; Ponosov, Yu. S.; Berger, I. F.; Proskurnina, N. V.; Zubkov, V. G.; Tyutyunnik, A. P.; Bushmeleva, S. N.; Balagurov, A. M.; Sheptyakov, D. V.; Burmakin, E. I.; Shekhtman, G. Sh.; Vovkotrub, E. G. (2006). "Crystal structure of the low-temperature form of K3PO4". Inorganic Materials. 42 (8): 908–913. doi:10.1134/S0020168506080206. S2CID 92351896.
^ "Potassium phosphate". pubchem.ncbi.nlm.nih.gov.
^ "Potassium phosphate tribasic P5629". Sigma-Aldrich. Retrieved 2018-04-27.
^ Klaus Schrödter; Gerhard Bettermann; Thomas Staffel; Friedrich Wahl; Thomas Klein; Thomas Hofmann (2012). "Phosphoric Acid and Phosphates". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi:10.1002/14356007.a19_465.pub3. ISBN 978-3527306732.

[autogenerated2-1] Voronin, V. I.; Ponosov, Yu. S.; Berger, I. F.; Proskurnina, N. V.; Zubkov, V. G.; Tyutyunnik, A. P.; Bushmeleva, S. N.; Balagurov, A. M.; Sheptyakov, D. V.; Burmakin, E. I.; Shekhtman, G. Sh.; Vovkotrub, E. G. (2006). "Crystal structure of the low-temperature form of K3PO4". Inorganic Materials. 42 (8): 908–913. doi:10.1134/S0020168506080206. S2CID 92351896.

[2] "Potassium phosphate". pubchem.ncbi.nlm.nih.gov.

[autogenerated4-3] "Potassium phosphate tribasic P5629". Sigma-Aldrich. Retrieved 2018-04-27.

[Ullmann-4] Klaus Schrödter; Gerhard Bettermann; Thomas Staffel; Friedrich Wahl; Thomas Klein; Thomas Hofmann (2012). "Phosphoric Acid and Phosphates". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi:10.1002/14356007.a19_465.pub3. ISBN 978-3527306732.

[1]

[2]

[3]

[4]

Names

Unit cell of tripotassium phosphate.
IUPAC name Potassium phosphate
Systematic IUPAC name Potassium tetraoxidophosphate(3−)
Other names Potassium phosphate, tribasic
Identifiers
CAS Number	7778-53-2^Y
3D model (JSmol)	Interactive image
ChEBI	CHEBI:190301
ChemSpider	56408^Y
ECHA InfoCard	100.029.006
EC Number	231-907-1
E number	E340(iii) (antioxidants, ...)
PubChem CID	62657
UNII	16D59922JU^Y
CompTox Dashboard (EPA)	DTXSID3043994
InChI InChI=1S/3K.H3O4P/c;;;1-5(2,3)4/h;;;(H3,1,2,3,4)/q3*+1;/p-3^Y Key: LWIHDJKSTIGBAC-UHFFFAOYSA-K^Y
SMILES [K+].[K+].[K+].[O-]P([O-])([O-])=O
Properties
Chemical formula	K₃PO₄
Molar mass	212.27 g/mol
Appearance	White deliquescent powder
Density	2.564 g/cm³ (17 °C)
Melting point	1,380 °C (2,520 °F; 1,650 K)
Solubility in water	90 g/100 mL (20 °C)
Solubility in ethanol	Insoluble
Basicity (pK_b)	1.6
Structure^[1]
Crystal structure	Primitive orthorhombic
Space group	Pnma, No. 62
Lattice constant	a = 1.123772 nm, b = 0.810461 nm, c = 0.592271 nm^[1]
Hazards^[2]
Occupational safety and health (OHS/OSH):
Main hazards	Irritant
GHS labelling:
Pictograms
Signal word	Warning
Hazard statements	H319
Precautionary statements	P264, P280, P305+P351+P338, P337+P313
NFPA 704 (fire diamond)	2 0 0
Flash point	Non-flammable
Safety data sheet (SDS)	MSDS
Related compounds
Other cations	Trisodium phosphate Triammonium phosphate Tricalcium phosphate
Related compounds	Monopotassium phosphate Dipotassium phosphate
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Y verify (what is ^YN ?) Infobox references