CAS 7558-79-4 Disodium hydrogenorthophosphate

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Disodium hydrogenorthophosphate

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Catalog Number

ACM7558794

CAS Number

7558-79-4

Product Name

Disodium hydrogenorthophosphate

Structure

Category

Electrolytes

Synonyms

DIBASIC SODIUM PHOSPHATE;DINATRII PHOSPHAS DIHYDRICUS;DINATRII PHOSPHAS ANHYDRICUS;DISODIUM PHOSHATE;DISODIUM PHOSPHATE DIHYDRATE;DISODIUM PHOSPHATE;DI-SODIUM HYDROGEN ORTHOPHOSPHATE;DI-SODIUM HYDROGEN ORTHOPHOSPHATE 2H₂O

Description

Sodium phosphate, dibasic appears as a colorless to white crystalline solid. Soluble in water. The primary hazard is the threat to the environment. Immediate steps should be taken to limit spread to the environment. Used as a fertilizer, in pharmaceuticals, in food processing, and for many other uses.;DryPowder; Liquid; PelletsLargeCrystals;Anhydrous disodium hydrogen phosphate is a white, hygroscopic, odourless powder. Hydrated forms available include the dihydrate: a white crystalline, odourless solid; the heptahydrate: white, odourless, efflorescent crystals or granular powder; and the dodecahydrate: white, efflorescent, odourless powder or crystals;WHITE OR COLOURLESS HYGROSCOPIC CRYSTALS OR POWDER.

IUPAC Name

disodium;hydrogen phosphate

Molecular Weight

141.959g/mol

Molecular Formula

Anhydrous:Na2HPO4; Hydrate: Na2HPO4? nH₂O (n = 2, 7 or 12);HO4PNa2;Na2HPO4;HNa2O4P

Canonical SMILES

OP(=O)([O-])[O-].[Na+].[Na+]

InChI

InChI=1S/2Na.H3O4P/c;;1-5(2,3)4/h;;(H3,1,2,3,4)/q2*+1;/p-2

InChI Key

BNIILDVGGAEEIG-UHFFFAOYSA-L

Melting Point

250 oC decomp.

Density

1.8 to 2.5 at 77 °F (USCG, 1999);approx 1.7 g/cu cm;0.5-1.2 g/cm³

Solubility

greater than or equal to 100 mg/mL at 68° F (NTP, 1992);Freely soluble in water. Insoluble in ethanol;11.8 g/100 g water at 25 °C;Soluble in 8 parts water, much more soluble in hot water. Solubility per 100 gal water increases from 14 lbs at slightly >0 °C to over 900 lbs at 95 °C. Insoluble in alcohol. /Anhydrous/;Solubility in water, g/100ml at 20 °C: 7.7

Color/Form

Colorless, translucent crystals or white powder.;White, hygroscopic powder

Complexity

46.5

Covalently-Bonded Unit Count

EC Number

231-448-7;231-448-7

Exact Mass

141.940784g/mol

Formal Charge

Heavy Atom Count

ICSC Number

1129

Log P

-5.8 (calculated)

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

141.940784g/mol

Odor

NONE

Other Experimental

Hygroscopic; converted to sodium pyrophosphate at about 240 °C.;Colorless crystals; 11.8 G sol in 100 cc water at 25 °C /Disodium phosphate heptahydrate/;Density 1.679, loses 5H₂O at 48 °C /Disodium phosphate heptahydrate/;Colorless, rhombic or monoclinic, white powder; 87.4 g sol in 100 cc water at 80 °C; Index of refraction: 1.432, 1.436, 1.437; efflorescent /Disodium phosphate dodecahydrate/;MP 35 °C, density 1.5235, readily loses 12H₂O at 100 °C /Disodium phosphate dodecahydrate/;Rhombic bispheroidal crystals; Index of refraction: 1.463 /Disodium phosphate dihydrate/;MP: loses H₂O at 92.5 °C; Specific gravity: 2.066 at 15 °C /Disodium phosphate dihydrate/;100 g sol in 100 ml water at 50 °C; 117 g sol in 100 ml water at 80 °C. /Disodium phosphate dihydrate/;11.8 g sol in 100 ml water at 25 °C /Disodium phosphate dodecahydrate/;Hygroscopic. On exposure to air will absorb from 2 to 7 mols of water depending on the temperature and humidity.;Crystals or granular powder. Stable in the air. Specific gravity 1.7. Soluble in 4 parts water, more soluble in boiling water; practically insoluble in alcohol. The aqueous solution is alkaline, pH=9.5. /Heptahydrate/;Translucent crystals or granules; readily loses 5 mols of water on exposure to air at ordinary temp. Melting point 34-35 °C (when it contains the full 12 mols of H₂O). Specific gravity 1.5. Soluble in 3 parts water; practically insoluble in alcohol. Aqueous solution is alkaline, pH=9.5. /Dodecahydrate/

Rotatable Bond Count

RTECS Number

WC4500000

Stability

On exposure to air, it absorbs 2-7 moles water depending on humidity and temperature.;Stable in air. /Disodium Phosphate Heptahydrate/;Readily loses 5 mols water on exposure to air at ordinary temp. /Disodium Phosphate Dodecahydrate/

UNII

22ADO53M6F

UN Number

3082

MSDS

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COA

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Spec Sheet

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