Description
DryPowder; DryPowder, PelletsLargeCrystals, WetSolid; Liquid; PelletsLargeCrystals;White odourless crystals, granules or crystalline powder;COLOURLESS-TO-WHITE HYGROSCOPIC CRYSTALS.
IUPAC Name
trisodium; phosphate
Molecular Weight
163.94
Molecular Formula
Na3O4P
Canonical SMILES
[O-]P(=O)([O-])[O-].[Na+].[Na+].[Na+]
InChI
InChI=1S/3Na.H3O4P/c;;;1-5(2,3)4/h;;;(H3,1,2,3,4)/q3*+1;/p-3
InChI Key
RYFMWSXOAZQYPI-UHFFFAOYSA-K
Melting Point
Mp 1583 °;1583 °C
Density
2.54 g/cu cm;Relative density (water = 1): 2.5
Solubility
Freely soluble in water. Insoluble in ethanol;14.5 g/100 g water at 25 °C;25.8 g sol in 100 g water at 20 °C;Qualitative solubility: soluble in water;Solubility in water, g/l at 20 °C: 121 (good)
Color Form
Colorless crystals
Complexity
36.8
Corrosivity
When wet, mild steel or brass may be corroded by trisodium phosphate.
Covalently-Bonded Unit Count
4
Decomposition
When heated to decomposition it emits toxic fumes of sodium oxide and phosphoxides.;75 °C
EC Number
231-509-8
Exact Mass
163.9227
Formal Charge
0
H-Bond Acceptor
4
H-Bond Donor
0
Heavy Atom Count
8
ICSC Number
1178
MDL Number
MFCD00003510
MeSH Entry Terms
dibasic sodium phosphate, anhydrous;disodium acid phosphate;disodium hydrogen phosphate;disodium hydrogen phosphate anhydrous;monosodium dihydrogen phosphate;neutral sodium hydrogen phosphate;phosphoric acid, disodium salt;phosphoric acid, disodium salt, 32P-labeled;phosphoric acid, disodium salt, anhydrous;phosphoric acid, disodium salt, dodecahydrate;phosphoric acid, disodium salt, heptahydrate;phosphoric acid, monosodium salt;phosphoric acid, monosodium salt, anhydrous;phosphoric acid, sodium (2:3) salt;phosphoric acid, sodium salt;phosphoric acid, trisodium salt;phosphoric acid, trisodium salt , 32P-labeled;phosphoric acid, trisodium salt , dodecahydrate;sodium biphosphate;sodium dihydrogen orthophosphate;sodium dihydrogen phosphate;sodium hydrophosphate;sodium phosphate;sodium phosphate monobasic anhydrous;sodium phosphate, dibasic;sodium phosphate, dibasic (anhydrous);sodium phosphate, disodium salt;sodium phosphate, monobasic;sodium phosphate, monobasic anhydrous;sodium phosphate, tribasic;sodium phosphate, tribasic, dodecahydrate;trisodium phosphate;trisodium phosphate dodecahydrate
Monoisotopic Mass
163.9227
Other Experimental
Crystallizes with 8 and 12 mols of H₂O.;Colorless or white crystals. When rapidly heated melts at about 75 °C. Does not lose the last mol of water even on moderate ignition. Specific gravity 1.6. Soluble in 3.5 parts water, 1 part boiling water; insol in alcohol. /Dodecahydrate/;Colorless, trigonal crystals; MP: approx 75 °C; density: 1.62 g/cu cm; solubility: 14.4 g/100 g water at 25 °C; qualitative solubility: insoluble in ethanol /Trisodium phosphate dodecahydrate/;Trisodium phosphate tends to pick up moisture from air and form a hard cake.
Physical State
White to off-white powder, crystals, or granules
Rotatable Bond Count
0
RTECS Number
TC9490000
Stability
Rapidly absorbs ... water if exposed to moist atmosphere /Dried sodium phosphate/
UNII
SX01TZO3QZ
UN Number
3262;3082
