Potassium Hydrogen Phosphate



Request Quote

(2N) 99% Potassium Hydrogen Phosphate K-HPAT-02 Request Quote
(2N5) 99.5% Potassium Hydrogen Phosphate K-HPAT-025 Request Quote
(3N) 99.9% Potassium Hydrogen Phosphate K-HPAT-03 Request Quote
(3N5) 99.95% Potassium Hydrogen Phosphate K-HPAT-035 Request Quote
(4N) 99.99% Potassium Hydrogen Phosphate K-HPAT-04 Request Quote
(5N) 99.999% Potassium Hydrogen Phosphate K-HPAT-05 Request Quote


Compound Formula K2HPO4
Molecular Weight 174.18
Appearance Colorless to white crystals
Melting Point N/A
Boiling Point N/A
Density N/A
Monoisotopic Mass 173.888659
Exact Mass 173.888659

Health & Safety Info  |  MSDS / SDS

Signal Word N/A
Hazard Statements N/A
Hazard Codes N/A
Risk Codes N/A
Safety Statements N/A
Transport Information N/A
Globally Harmonized System of Classification and Labelling (GHS) N/A


Potassium Hydrogen Phosphate 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.


Di-potassium monohydrogen phosphate; Potassium phosphate dibasic; Dipotassium hydrogen phosphate; Dipotassium hydrogenphosphate; Potassium hydrogen phosphate (2:1:1); Potassium phosphate, dibasic, Potassium dibasic phosphate, sec.-Potassium phosphate, Dipotassium monophosphate, Dipotassium orthophosphate, Potassium monohydrogen phosphate, Potassium monophosphate, Dipotassium-O-phosphate

Chemical Identifiers

Formula K2HPO4
CAS 7758-11-4
Pubchem CID 24450
MDL MFCD00011383
EC No. 231-834-5
IUPAC Name dipotassium; hydrogen phosphate
Beilstein Registry No. N/A
SMILES [K+].[K+].[O-]P([O-])(=O)O
InchI Identifier InChI=1S/2K.H3O4P/c;;1-5(2,3)4/h;;(H3,1,2,3,4)/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 Products & Element Information

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 110.5.pm and its Van der Waals radius is 180.pm. 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.

Elemental PotassiumSee more Potassium products. Potassium (atomic symbol: K, atomic number: 19) is a Block S, Group 1, Period 4 element with an atomic weight of 39.0983. The number of electrons in each of Potassium's shells is [2, 8, 8, 1] and its electron configuration is [Ar] 4s1. The potassium atom has a radius of 227.2 pm and a Van der Waals radius of 275 pm. Potassium was discovered and first isolated by Sir Humphrey Davy in 1807. Potassium is the seventh most abundant element on earth. It is one of the most reactive and electropositive of all metals and rapidly oxidizes. As with other alkali metals, potassium decomposes in water with the evolution of hydrogen because of its reacts violently with water, it only occurs in nature in ionic salts.Potassium Bohr Model In its elemental form, potassium has a silvery gray metallic appearance, but its compounds (such as potassium hydroxide) are more frequently used in industrial and chemical applications. The origin of the element's name comes from the English word 'potash,' meaning pot ashes, and the Arabic word qali, which means alkali. The symbol K originates from the Latin word kalium.

Recent Research

Preparation of cube micrometer potassium niobate (KNbO3) by hydrothermal method and sonocatalytic degradation of organic dye., Zhang, Hongbo, Wei Chunsheng, Huang Yingying, and Wang Jun , Ultrason Sonochem, 2016 May, Volume 30, p.61-9, (2016)

Inwardly rectifying potassium channel 4.1 expression in post-traumatic syringomyelia., Najafi, E, Stoodley M A., Bilston L E., and Hemley S J. , Neuroscience, 2016 Mar 11, Volume 317, p.23-35, (2016)

Coexpression of auxiliary subunits KChIP and DPPL in potassium channel Kv4-positive nociceptors and pain-modulating spinal interneurons., Cheng, Chau-Fu, Wang Wan-Chen, Huang Chia-Yi, Du Po-Hau, Yang Jung-Hui, and Tsaur Meei-Ling , J Comp Neurol, 2016 Mar 1, Volume 524, Issue 4, p.846-73, (2016)

Catalytic effect of potassium in Na1-xKxCdPb3(PO4)3 to detect mercury (II) in fish and seawater using a carbon paste electrode., Lahrich, S, Manoun B, and Mhammedi M A. El , Talanta, 2016 Mar 1, Volume 149, p.158-67, (2016)

Kv7.5 Potassium Channel Subunits Are the Primary Targets for PKA-Dependent Enhancement of Vascular Smooth Muscle Kv7 Currents., Mani, Bharath K., Robakowski Christina, Brueggemann Lyubov I., Cribbs Leanne L., Tripathi Abhishek, Majetschak Matthias, and Byron Kenneth L. , Mol Pharmacol, 2016 Mar, Volume 89, Issue 3, p.323-34, (2016)

Nitrate reductase mutation alters potassium nutrition as well as nitric oxide-mediated control of guard cell ion channels in Arabidopsis., Chen, Zhong-Hua, Wang Yizhou, Wang Jian-Wen, Babla Mohammad, Zhao Chenchen, García-Mata Carlos, Sani Emanuela, Differ Christopher, Mak Michelle, Hills Adrian, et al. , New Phytol, 2016 Mar, Volume 209, Issue 4, p.1456-69, (2016)

High potassium level during pregnancy is associated with future cardiovascular morbidity., Wolak, Talya, Shoham-Vardi Ilana, Sergienko Ruslan, and Sheiner Eyal , J Matern Fetal Neonatal Med, 2016 Mar, Volume 29, Issue 6, p.1021-4, (2016)

Imaging potassium-flux through individual electropores in droplet interface bilayers., Szabo, Marc, and Wallace Mark I. , Biochim Biophys Acta, 2016 Mar, Volume 1858, Issue 3, p.613-7, (2016)

Evidence for glucagon-like peptide-1 receptor signaling to activate ATP-sensitive potassium channels in pancreatic beta cells., Kwon, Hye-Jung, Park Hyun-Sun, Park Sung-Hee, Park Jae-Hyung, Shin Su-Kyung, Song Seung Eun, Hwang Meeyul, Cho Ho-Chan, and Song Dae-Kyu , Biochem Biophys Res Commun, 2016 Jan 8, Volume 469, Issue 2, p.216-21, (2016)