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Cesium Formate Solution

CAS #:

Linear Formula:


MDL Number:


EC No.:



(2N) 99% Cesium Formate Solution
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(3N) 99.9% Cesium Formate Solution
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(4N) 99.99% Cesium Formate Solution
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(5N) 99.999% Cesium Formate Solution
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Cesium Formate Solution Properties (Theoretical)

Compound Formula CHCsO2
Molecular Weight 177.92
Appearance Colorless liquid
Melting Point N/A
Boiling Point 112-145 °C
Density 1.7-2.4 g/cm3
Solubility in H2O N/A
Exact Mass 177.903106
Monoisotopic Mass 177.903106

Cesium Formate Solution Health & Safety Information

Signal Word Warning
Hazard Statements H302-H319-H371-H373
Hazard Codes Xi
Risk Codes 36/37/38
Safety Statements 26-36/37/39
RTECS Number N/A
Transport Information N/A
WGK Germany 3

About Cesium Formate Solution

Cesium Formate Solution (Cesium Formate Brine, or CsFo) is an aqueous solution of cesium formate used primarily by the oil and gas industry as a drilling fluid, drill tip lubricant, and a foundation stabilizer due to its high density, environmental friendliness, and stability under high temperature and pressure environments. Cesium formate brines have numerous other industrial and chemical applications. It has also been used as a precursor material for cesium tin iodide (CsSnI3), a promising semiconducting perovskite crystal for highly efficient photovoltaic solar cells. American Elements produces cesium formate in 80% aqueous solution in numerous standard grades and purities, from Technical Grade to 99.99+% (metals basis), in addition to cesium formate powder and chunks; we can also manufacture to customer specifications. Typical and custom packaging is available, as is additional research, technical and safety (MSDS) data. Please follow the links above to request a quote, indicating the general quantity and any specifications you require.

Cesium Formate Solution Synonyms

CsCOOH; CsFo; Caesium formate solution; Formic acid, cesium salt, cesium formate brine; aqueous cesium formate

Chemical Identifiers

Linear Formula CsOOCH
MDL Number MFCD00039103
EC No. 222-492-8
Beilstein Registry No. 3912426
Pubchem CID 23663999
IUPAC Name cesium; formate
InchI Identifier InChI=1S/CH2O2.Cs/c2-1-3;/h1H,(H,2,3);/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

See more Cesium products. Cesium (or Caesium) (atomic symbol: Ce, atomic number: 55) is a Block S, Group 1, Period 6 element with an atomic weight of 132.9054519. The number of electrons in each of Cesium's shells is 2, 8, 18, 18, 8, 1 and its electron configuration is [Xe] 6s1. Cesium Bohr ModelThe cesium atom has a radius of 265 pm and a Van der Waals radius of 343 pm. Cesium is a member of the alkali group of metals.It is one of three metals that occur as a liquid at room temperature, the others being mercury and gallium. Elemental CesiumCesium's main commercial source is pollucite ore; however, it is also found in beryl, avogadrite, pezzottaite, and londonite. Cesium was discovered by Robert Bunsen and Gustav Kirchhoff in 1860 and first isolated by Carl Setterberg in 1882. In its elemental form, cesium has a silvery gold appearance. The word Cesium originates from the Latin word "caesius," meaning "sky blue," which refers to the vibrant blue lines in its spectrum.


May 25, 2019
Los Angeles, CA
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