Sodium Phosphate Dibasic Dihydrate

CAS #:

Linear Formula:

Na2HPO4 • 2H2O

MDL Number:


EC No.:



98% Sodium Phosphate Dibasic Dihydrate
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(2N) 99% Sodium Phosphate Dibasic Dihydrate
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(3N) 99.9% Sodium Phosphate Dibasic Dihydrate
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(4N) 99.99% Sodium Phosphate Dibasic Dihydrate
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Sodium Phosphate Dibasic Dihydrate Properties (Theoretical)

Compound Formula H5Na2O6P
Molecular Weight 177.987
Appearance White powder, crystals, or granules
Melting Point 243-245 °C
Boiling Point N/A
Density 1.7 g/cm3
Solubility in H2O 0.5 M (25 °C)
pH 8.9-9.2 (25 °C)
Exact Mass 177.962 g/mol
Monoisotopic Mass 177.962 g/mol

Sodium Phosphate Dibasic Dihydrate Health & Safety Information

Signal Word N/A
Hazard Statements N/A
Hazard Codes N/A
Precautionary Statements N/A
RTECS Number N/A
Transport Information UN 3077 9 / PGIII
WGK Germany 1

About Sodium Phosphate Dibasic Dihydrate

Phosphate IonSodium Phosphate Dibasic Dihydrate is generally immediately available in most volumes. High purity, submicron and nanopowder forms may be considered. American Elements produces to many standard grades when applicable, including Mil Spec (military grade); ACS, Reagent and Technical Grade; Food, Agricultural and Pharmaceutical Grade; Optical Grade, USP and EP/BP (European Pharmacopoeia/British Pharmacopoeia) and follows applicable ASTM testing standards. Typical and custom packaging is available. Additional technical, research and safety (MSDS) information is available as is a Reference Calculator for converting relevant units of measurement.

Sodium Phosphate Dibasic Dihydrate Synonyms

Disodium hydrogen phosphate dihydrate; sec-Sodium phosphate dihydrate; di-sodium hydrogen phosphate dihydrate; Disodium acid orthophosphate dihydrate; Disodium acid phosphate dihydrate; Disodium hydrogenorthophosphate dihydrate; Phosphoric acid disodium salt dihydrate; Sodium hydrogen phosphate hydrate (2:1:2), UNII 94255I6E2T

Chemical Identifiers

Linear Formula Na2HPO4 • 2H2O
MDL Number MFCD00149182
EC No. 600-053-5
Beilstein/Reaxys No. N/A
Pubchem CID 6451167
IUPAC Name disodium; hydrogen phosphate; dihydrate
SMILES O.O.OP(=O)([O-])[O-].[Na+].[Na+]
InchI Identifier InChI=1S/2Na.H3O4P.2H2O/c;;1-5(2,3)4;;/h;;(H3,1,2,3,4);2*1H2/q2*+1;;;/p-2

Packaging Specifications

Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and steel drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Shipping documentation includes a Certificate of Analysis and Safety Data Sheet (SDS). Solutions are packaged in polypropylene, plastic or glass jars up to palletized 440 gallon liquid totes, and 36,000 lb. tanker trucks.

Related Elements


Phosphorus Bohr ModelSee more Phosphorus products. Phosphorus (atomic symbol: P, atomic number: 15) is a Block P, Group 15, Period 3 element. The number of electrons in each of Phosphorus's shells is 2, 8, 5 and its electronic configuration is [Ne] 3s2 3p3. The phosphorus atom has a radius of and its Van der Waals radius is Phosphorus is a highly-reactive non-metallic element (sometimes considered a metalloid) with two primary allotropes, white phosphorus and red phosphorus its black flaky appearance is similar to graphitic carbon. Compound forms of phosphorus include phosphates and phosphides. Phosphorous was first recognized as an element by Hennig Brand in 1669 its name (phosphorus mirabilis, or "bearer of light") was inspired from the brilliant glow emitted by its distillation.


Sodium Bohr ModelSee more Sodium products. Sodium (atomic symbol: Na, atomic number: 11) is a Block D, Group 5, Period 4 element with an atomic weight of 22.989769. The number of electrons in each of Sodium's shells is [2, 8, 1] and its electron configuration is [Ne] 3s1. The sodium atom has a radius of 185.8 pm and a Van der Waals radius of 227 pm. Sodium was discovered and first isolated by Sir Humphrey Davy in 1807. In its elemental form, sodium has a silvery-white metallic appearance. It is the sixth most abundant element, making up 2.6 % of the earth's crust. Sodium does not occur in nature as a free element and must be extracted from its compounds (e.g., feldspars, sodalite, and rock salt). The name Sodium is thought to come from the Arabic word suda, meaning "headache" (due to sodium carbonate's headache-alleviating properties), and its elemental symbol Na comes from natrium, its Latin name.

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