CAS #:

Linear Formula:

KH3(C2O4)2 • 2H2O

MDL Number:


EC No.:



(2N) 99% Potassium Tetraoxalate Dihydrate
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(2N5) 99.5% Potassium Tetraoxalate Dihydrate
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(3N) 99.9% Potassium Tetraoxalate Dihydate
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(3N5) 99.95% Potassium Tetraoxalate Dihydate
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(4N) 99.99% Potassium Tetraoxalate Dihydrate
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(5N) 99.999% Potassium Tetraoxalate Dihydrate
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Potassium Tetraoxalate Dihydrate Properties (Theoretical)

Compound Formula C4H7KO10
Molecular Weight 254.19
Appearance White crystalline solid
Melting Point N/A
Boiling Point N/A
Density N/A
Solubility in H2O N/A
Exact Mass 253.967628
Monoisotopic Mass 253.967628

Potassium Tetraoxalate Dihydrate Health & Safety Information

Signal Word Danger
Hazard Statements H302 + H312-H314
Hazard Codes Xi, C
Precautionary Statements P260-P280-P301 + P312 + P330-P303 + P361 + P353-P304 + P340 + P310-P305 + P351 + P338
Risk Codes R21/22
Safety Statements S24/25
RTECS Number N/A
Transport Information NONH for all modes of transport
WGK Germany 1
GHS Pictograms

About Potassium Tetraoxalate Dihydrate

Potassium Tetraoxalate 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 Tetraoxalate Dihydrate Synonyms

Potassium Trihydrogen Dioxalate Dihydrate; Oxalic acid hemipotassium salt; Potassium hydrogen ethanedioate ethanedioic acid hydrate (1:1:1:2); NISR SRM 189c; Potassium tetraoxalate dihydrate, certified secondary standard reference material for pH measurement;

Chemical Identifiers

Linear Formula KH3(C2O4)2 • 2H2O
MDL Number MFCD00150443
EC No. 204-874-6
Beilstein/Reaxys No. 3854419
Pubchem CID 23664780
IUPAC Name potassium; 2-hydroxy-2-oxoacetate; oxalic acid; dihydrate
SMILES C(=O)(C(=O)O)O.C(=O)(C(=O)[O-])O.O.O.[K+]
InchI Identifier InChI=1S/2C2H2O4.K.2H2O/c2*3-1(4)2(5)6;;;/h2*(H,3,4)(H,5,6);;2*1H2/q;;+1;;/p-1

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


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.


June 05, 2023
Los Angeles, CA
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