Potassium Hydrogen Phosphate

CAS 7758-11-4

Product Product Code Order or Specifications
(2N) 99% Potassium Hydrogen Phosphate K-HPAT-02 Contact American Elements
(2N5) 99.5% Potassium Hydrogen Phosphate K-HPAT-025 Contact American Elements
(3N) 99.9% Potassium Hydrogen Phosphate K-HPAT-03 Contact American Elements
(3N5) 99.9% Potassium Hydrogen Phosphate K-HPAT-035 Contact American Elements
(4N) 99.99% Potassium Hydrogen Phosphate K-HPAT-04 Contact American Elements
(5N) 99.999% Potassium Hydrogen Phosphate K-HPAT-05 Contact American Elements

Formula CAS No. PubChem SID PubChem CID MDL No. EC No IUPAC Name Beilstein
Re. No.
K2HPO4 7758-11-4 134989988 24450 MFCD00011383 231-834-5 dipotassium; hydrogen phosphate N/A [K+].[K+].[O-]

PROPERTIES Compound Formula Mol. Wt. Appearance Melting Point Boiling Point Density

Exact Mass

Monoisotopic Mass Charge MSDS
K2HPO4 174.18 Colorless to white crystals N/A N/A N/A 173.888659 173.888659 0 Safety Data Sheet

Phosphate IonPotassium 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.

Potassium (K) atomic and molecular weight, atomic number and elemental symbol Elemental PotassiumPotassium (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. Potassium Bohr ModelAs 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. 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'. For more information on potassium, including properties, safety data, research, and American Elements' catalog of potassium products, visit the Potassium Information Center.

Phosphorus(P) atomic and molecular weight, atomic number and elemental symbolPhosphorus Bohr ModelPhosphorus (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. For more information on phosphorus, including properties, safety data, research, and American Elements' catalog of phosphorus products, visit the Phosphorus Information Center.

Material Safety Data Sheet MSDS
Signal Word N/A
Hazard Statements N/A
Hazard Codes N/A
Risk Codes N/A
Safety Precautions N/A
RTECS Number N/A
Transport Information N/A
WGK Germany 3
Globally Harmonized System of
Classification and Labelling (GHS)

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

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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 Material Safety Data Sheet (MSDS). Solutions are packaged in polypropylene, plastic or glass jars up to palletized 440 gallon liquid totes.

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Recent Research & Development for Potassium

  • Dragoslav Ilić, Verica V. Jevtić, Miorad M. Vasojević, Miodrag Ž. Jelić, Ivana D. Radojević, Ljiljana R. Čomić, Slađana B. Novaković, Goran A. Bogdanović, Ivan Potočňák, Srećko R. Trifunović, Stereospecific ligands and their complexes. Part XXI. Synthesis, characterization, circular dichroism and antimicrobial activity of cobalt(III) complexes with some edda-type of ligands. Crystal structure of potassium-Δ-(−)589-s-cis-oxalato-(S,S)-ethylenediamine-N,N′-di-(2-propanoato)-cobaltate(III)-semihydrate, K-Δ-(−)589-s-cis-[Co(S,S-eddp)(ox)]·0.5H2O, Polyhedron, Volume 85, 8 January 2015
  • T. Palacios, J. Reiser, J. Hoffmann, M. Rieth, A. Hoffmann, J.Y. Pastor, Microstructural and mechanical characterization of annealed tungsten (W) and potassium-doped tungsten foils, International Journal of Refractory Metals and Hard Materials, Volume 48, January 2015
  • Prasanna Padigi, Gary Goncher, David Evans, Raj Solanki, Potassium barium hexacyanoferrate – A potential cathode material for rechargeable calcium ion batteries, Journal of Power Sources, Volume 273, 1 January 2015
  • V.G. Goffman, A.V. Gorokhovsky, M.M. Kompan, E.V. Tretyachenko, O.S. Telegina, A.V. Kovnev, F.S. Fedorov, Electrical properties of the potassium polytitanate compacts, Journal of Alloys and Compounds, Volume 615, Supplement 1, 5 December 2014
  • Jorge Omar Gil Posada, Peter J. Hall, Post-hoc comparisons among iron electrode formulations based on bismuth, bismuth sulphide, iron sulphide, and potassium sulphide under strong alkaline conditions, Journal of Power Sources, Volume 268, 5 December 2014
  • Renan Azevedo da Rocha, Carolina Leão Quintanilha, Thayná Viana Lanxin, Júlio Carlos Afonso, Cláudio Augusto Vianna, Valdir Gante, José Luiz Mantovano, Production of potassium manganate and barium manganate from spent zinc–MnO2 dry cells via fusion with potassium hydroxide, Journal of Power Sources, Volume 268, 5 December 2014
  • Kaiyou Zhang, Hong Chen, Xue Wang, Donglin Guo, Chenguo Hu, Shuxia Wang, Junliang Sun, Qiang Leng, Synthesis and structure determination of potassium copper selenide nanowires and solid-state supercapacitor application, Journal of Power Sources, Volume 268, 5 December 2014
  • Elena Yazhenskikh, Tatjana Jantzen, Klaus Hack, Michael Müller, Critical thermodynamic evaluation of oxide systems relevant to fuel ashes and slags: Potassium oxide–magnesium oxide–silica, Calphad, Volume 47, December 2014
  • Nicolay Yu. Adonin, Anton Yu. Shabalin, Vadim V. Bardin, Hydrodeboration of potassium polyfluoroaryl(fluoro)borates with alcohols, Journal of Fluorine Chemistry, Volume 168, December 2014
  • C. Balbuena, M.A. Frechero, R.A. Montani, Channel diffusion in a lithium–potassium metasilicate glass using the isoconfigurational ensemble: Towards a scenario for the mixed alkali effect, Journal of Non-Crystalline Solids, Volume 405, 1 December 2014

Recent Research & Development for Phosphates

  • E.J.C. Davim, M.H.V. Fernandes, A.M.R. Senos, Increased surface area during sintering of calcium phosphate glass and sodium chloride mixtures, Journal of the European Ceramic Society, Volume 35, Issue 1, January 2015
  • Ruifeng Li, Gaohui Wu, Longtao Jiang, Dongli Sun, Characterization of multi-scale porous structure of fly ash/phosphate geopolymer hollow sphere structures: From submillimeter to nano-scale, Micron, Volume 68, January 2015
  • Adrian H.A. Lutey, Alessandro Fortunato, Alessandro Ascari, Simone Carmignato, Claudio Leone, Laser cutting of lithium iron phosphate battery electrodes: Characterization of process efficiency and quality, Optics & Laser Technology, Volume 65, January 2015
  • Jie Xie, Yan Lin, Chunjie Li, Deyi Wu, Hainan Kong, Removal and recovery of phosphate from water by activated aluminum oxide and lanthanum oxide, Powder Technology, Volume 269, January 2015
  • Jiaxin Yu, Hailong Hu, Fei Jia, Weifeng Yuan, Hongbin Zang, Yong Cai, Fang Ji, Quantitative investigation on single-asperity friction and wear of phosphate laser glass against a spherical AFM diamond tip, Tribology International, Volume 81, January 2015
  • Mingchao Wang, Jiachen Liu, Haiyan Du, Feng Hou, Anran Guo, Yingna Zhao, Jing Zhang, A new practical inorganic phosphate adhesive applied under both air and argon atmosphere, Journal of Alloys and Compounds, Volume 617, 25 December 2014
  • Yuanming Lai, Xiaofeng Liang, Shiyuan Yang, Pei Liu, Yiming Zeng, Changyi Hu, Raman and FTIR spectra of CeO2 and Gd2O3 in iron phosphate glasses, Journal of Alloys and Compounds, Volume 617, 25 December 2014
  • Zhaoyong Chen, Ming Xu, Binglin Du, Huali Zhu, Tian Xie, Wenhua Wang, Morphology control of lithium iron phosphate nanoparticles by soluble starch-assisted hydrothermal synthesis, Journal of Power Sources, Volume 272, 25 December 2014
  • Tao Jiang, Xinhao Feng, Qingwen Wang, Zefang Xiao, Fengqiang Wang, Yanjun Xie, Fire performance of oak wood modified with N-methylol resin and methylolated guanylurea phosphate/boric acid-based fire retardant, Construction and Building Materials, Volume 72, 15 December 2014
  • Ercan Avci, Enhanced cathode performance of nano-sized lithium iron phosphate composite using polytetrafluoroethylene as carbon precursor, Journal of Power Sources, Volume 270, 15 December 2014