Trisodium phosphate

Trisodium phosphate^[1]
	; Sodium, Na Phosphorus, P Oxygen, O
	; Trisodium phosphate hydrate
Names
	IUPAC name Trisodium phosphate
	Other names Sodium phosphate; Sodium phosphate tribasic; Trisodium orthophosphate;
Identifiers
CAS Number	7601-54-9 ; 10101-89-0 (dodecahydrate) ;
3D model (JSmol)	Interactive image;
ChEBI	CHEBI:37583 ;
ChEMBL	ChEMBL363100 ;
ChemSpider	22665 ;
ECHA InfoCard	100.028.645
EC Number	231-509-8;
E number	E339(iii) (antioxidants, ...)
KEGG	D09000 ;
PubChem CID	24243;
RTECS number	TC9575000; V10XX01 (WHO) (32P);
UNII	SX01TZO3QZ ; B70850QPHR (dodecahydrate) ;
CompTox Dashboard (EPA)	DTXSID2035223 ;
	InChI InChI=1S/3Na.H3O4P/c;;;1-5(2,3)4/h;;;(H3,1,2,3,4)/q3+1;/p-3 Key: RYFMWSXOAZQYPI-UHFFFAOYSA-K ; InChI=1/3Na.H3O4P/c;;;1-5(2,3)4/h;;;(H3,1,2,3,4)/q3+1;/p-3 Key: RYFMWSXOAZQYPI-DFZHHIFOAM;
	SMILES [O-]P(=O)([O-])[O-].[Na+].[Na+].[Na+];
Properties
Chemical formula	Na3PO4
Molar mass	163.939 g·mol−1
Appearance	White, granular or crystalline solid
Density	2.536 g/cm3 (17.5 °C, anhydrous); 1.62 g/cm3 (20 °C, dodecahydrate)
Melting point	1,583 °C (2,881 °F; 1,856 K) (anhydrous); 73.4 °C (164.1 °F; 346.5 K) (dodecahydrate)
Boiling point	100 °C (212 °F; 373 K) (dodecahydrate) decomposes
Solubility in water	anhydrous:; 5.4 g/(100 mL) (0 °C); 12 g/(100 mL) (20 °C); 14.5 g/(100 mL) (25 °C); 23.3 g/(100 mL) (40 °C); 94.6 g/(100 mL) (100 °C); dodecahydrate:; 28.3 g/(100 mL) (20 °C);
Solubility	Insoluble in ethanol, carbon disulfide
Basicity (pKb)	2.23
Structure
Crystal structure	Trigonal
Thermochemistry
Heat capacity (C)	665 J/(mol·K) (dodecahydrate)
Std molar; entropy (S⦵298)	224.7 J/(mol·K) (anhydrous); 660 J/(mol·K) (dodecahydrate)
Std enthalpy of; formation (ΔfH⦵298)	−1935.5 kJ/mol (anhydrous); −5480 kJ/mol (dodecahydrate)
Gibbs free energy (ΔfG⦵)	−1819 kJ/mol (anhydrous)
Pharmacology
ATC code	A06AD17 (WHO) A06AG01 (WHO) B05XA09 (WHO)
Hazards
	GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H315, H318, H335
Precautionary statements	P261, P280, P305+P351+P338
NFPA 704 (fire diamond)	2 0 1
Flash point	Non-flammable
Safety data sheet (SDS)	ICSC 1178
Related compounds
Other cations	Tripotassium phosphate; Triammonium phosphate; Trimagnesium phosphate;
Related compounds	Monosodium phosphate; Disodium 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

Trisodium phosphate (TSP) is an inorganic compound with the chemical formula Na₃P O₄. It is a white, granular or crystalline solid, highly soluble in water, producing an alkaline solution. TSP is used as a cleaning agent, builder, lubricant, food additive, stain remover, and degreaser.^[7]

As an item of commerce TSP is often partially hydrated and may range from anhydrous Na₃PO₄ to the dodecahydrate Na₃PO₄·12H₂O. Most often it is found in white powder form. It can also be called trisodium orthophosphate or simply sodium phosphate.

^ Merck Index, 12th Edition, 8808.
^ Eagleson, Mary, ed. (1994). Concise Encyclopedia Chemistry. Walter de Gruyter. p. 1000. ISBN 978-3-11-011451-5. Retrieved 25 May 2014.
^ ^a ^b ^c ^d ^e ^f "Sodium phosphate".
^ ^a ^b ^c ^d ^e ^f ^g ^h "Sodium phosphate dodecahydrate".
^ "Archived copy" (PDF). Archived from the original (PDF) on 14 March 2016. Retrieved 25 May 2014.{{cite web}}: CS1 maint: archived copy as title (link)
^ Sigma-Aldrich Co., Sodium phosphate. Retrieved on 2014-05-25.
^ Cite error: The named reference Ullmann was invoked but never defined (see the help page).

[1] Merck Index, 12th Edition, 8808.

[cec-2] Eagleson, Mary, ed. (1994). Concise Encyclopedia Chemistry. Walter de Gruyter. p. 1000. ISBN 978-3-11-011451-5. Retrieved 25 May 2014.

[chemister-3] ^ ^a ^b ^c ^d ^e ^f "Sodium phosphate".

[chemister2-4] ^ ^a ^b ^c ^d ^e ^f ^g ^h "Sodium phosphate dodecahydrate".

[5] "Archived copy" (PDF). Archived from the original (PDF) on 14 March 2016. Retrieved 25 May 2014.{{cite web}}: CS1 maint: archived copy as title (link)

[sigma-6] Sigma-Aldrich Co., Sodium phosphate. Retrieved on 2014-05-25.

[Ullmann-7] Cite error: The named reference Ullmann was invoked but never defined (see the help page).

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Names

Sodium, Na Phosphorus, P Oxygen, O
Trisodium phosphate hydrate
IUPAC name Trisodium phosphate
Other names Sodium phosphate Sodium phosphate tribasic Trisodium orthophosphate
Identifiers
CAS Number	7601-54-9^Y 10101-89-0 (dodecahydrate)^Y
3D model (JSmol)	Interactive image
ChEBI	CHEBI:37583^Y
ChEMBL	ChEMBL363100^Y
ChemSpider	22665^Y
ECHA InfoCard	100.028.645
EC Number	231-509-8
E number	E339(iii) (antioxidants, ...)
KEGG	D09000^Y
PubChem CID	24243
RTECS number	TC9575000 V10XX01 (WHO) (³²P)
UNII	SX01TZO3QZ^Y B70850QPHR (dodecahydrate)^Y
CompTox Dashboard (EPA)	DTXSID2035223
InChI InChI=1S/3Na.H3O4P/c;;;1-5(2,3)4/h;;;(H3,1,2,3,4)/q3+1;/p-3^Y Key: RYFMWSXOAZQYPI-UHFFFAOYSA-K^Y InChI=1/3Na.H3O4P/c;;;1-5(2,3)4/h;;;(H3,1,2,3,4)/q3+1;/p-3 Key: RYFMWSXOAZQYPI-DFZHHIFOAM
SMILES [O-]P(=O)([O-])[O-].[Na+].[Na+].[Na+]
Properties
Chemical formula	Na₃PO₄
Molar mass	163.939 g·mol⁻¹
Appearance	White, granular or crystalline solid
Density	2.536 g/cm³ (17.5 °C, anhydrous) 1.62 g/cm³ (20 °C, dodecahydrate)^[2]^[3]^[4]
Melting point	1,583 °C (2,881 °F; 1,856 K) (anhydrous)^[3] 73.4 °C (164.1 °F; 346.5 K) (dodecahydrate)^[4]
Boiling point	100 °C (212 °F; 373 K) (dodecahydrate) decomposes^[4]
Solubility in water	anhydrous:^[3] 5.4 g/(100 mL) (0 °C) 12 g/(100 mL) (20 °C)^[5] 14.5 g/(100 mL) (25 °C) 23.3 g/(100 mL) (40 °C) 94.6 g/(100 mL) (100 °C) dodecahydrate:^[4] 28.3 g/(100 mL) (20 °C)
Solubility	Insoluble in ethanol, carbon disulfide^[4]
Basicity (pK_b)	2.23
Structure
Crystal structure	Trigonal
Thermochemistry
Heat capacity (C)	665 J/(mol·K) (dodecahydrate)^[4]
Std molar entropy (S^⦵₂₉₈)	224.7 J/(mol·K) (anhydrous)^[3] 660 J/(mol·K) (dodecahydrate)^[4]
Std enthalpy of formation (Δ_fH^⦵₂₉₈)	−1935.5 kJ/mol (anhydrous)^[3] −5480 kJ/mol (dodecahydrate)^[4]
Gibbs free energy (Δ_fG^⦵)	−1819 kJ/mol (anhydrous)^[3]
Pharmacology
ATC code	A06AD17 (WHO) A06AG01 (WHO) B05XA09 (WHO)
Hazards^[6]
GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H315, H318, H335
Precautionary statements	P261, P280, P305+P351+P338
NFPA 704 (fire diamond)	2 0 1
Flash point	Non-flammable
Safety data sheet (SDS)	ICSC 1178
Related compounds
Other cations	Tripotassium phosphate Triammonium phosphate Trimagnesium phosphate
Related compounds	Monosodium phosphate Disodium phosphate
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). N verify (what is ^YN ?) Infobox references