Molekula
Cesium carbonate 99.9% min
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 2000 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
Cesium carbonate (Cs2CO3) is an inorganic salt widely used as a strong base in organic synthesis, particularly in palladium-catalyzed coupling reactions like Suzuki reactions, and as a mild base for O- and N-alkylation reactions, where its solubility in polar aprotic solvents and the 'cesium effect' improve yields. It is also employed in the production of specialty glasses and as a flux in metallurgy. Further applications include catalysing ethylene oxide polymerization, formulating coatings for spatter-free welding of steel under CO2, and making oxide cathodes. Cesium carbonate (CAS 534-17-8) has a minimum purity of 99.9%, a molecular weight of 325.82 g/mol, and requires ambient storage. It carries a Danger signal word due to its corrosive and hazardous properties. Molekula supplies cesium carbonate from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Example image for illustration only. Other packaging and pack sizes are available.
Pricing & pack sizes
Pack sizes & pricing
Pricing on request — packs available from research to bulk quantities.
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Prices exclude VAT/sales tax and shipping.
Specifications
| Property | Value |
|---|---|
| Appearance | White crystalline powder |
| Identification | Conforms to reference |
| Loss on Ignition | ≤0.5% max (@ 200 Deg C) |
| Loss on Drying | ≤0.5% max (@ 500 Deg C) |
| Assay | ≥ 99.9% |
| Iron (Fe) | ≤0.01% |
| Calcium (Ca) | ≤0.005% |
| Magnesium (Mg) | ≤0.001% |
| Potassium (K) | ≤0.02% |
| Sodium (Na) | ≤0.02% |
| Aluminium (Al) | ≤0.005% |
| Sulphates (SO4)(2-) | ≤0.01% |
| PSD | -325 mesh, 100% through |
| Lithium (Li) | ≤0.001% |
| Rubidium (Rb) | ≤0.5% |
| PSD - 100 mesh | -100 mesh, 100% through |
| Silicon Dioxide (SiO2) | ≤0.005% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Base |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Melting Point | 793 °C |
Source: PubChem CID 10796 (PAC Chemical Database)
Identification
| Property | Value |
|---|---|
| SKU | 90031861 |
| CAS Number | 534-17-8 |
| IUPAC Name | dicesium;carbonate |
| EC Number | 249-784-8 |
| Molecular Formula | Cs2CO3 |
| Molecular Weight | 325.82 |
| Exact Mass | 325.7956 |
| SMILES | C(=O)([O-])[O-].[Cs+].[Cs+] |
| InChIKey | FJDQFPXHSGXQBY-UHFFFAOYSA-L |
| InChI | InChI=1S/CH2O3.2Cs/c2-1(3)4;;/h(H2,2,3,4);;/q;2*+1/p-2 |
| PubChem CID | 10796 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 28369950 |
| Tariff Code | 2836991780 |
Safety & GHS
-
Corrosive
GHS05
-
Health Hazard
GHS07
-
Serious Health Hazard
GHS08
Hazard statements
- H315 Causes skin irritation
- H318 Causes serious eye damage
- H335 May cause respiratory irritation
- H361 Suspected of damaging fertility or the unborn child
- H373 May cause damage to organs through prolonged or repeated exposure
Precautionary statements
- P261 Avoid breathing dust/fume/gas/mist/vapours/spray
- P263 Avoid contact during pregnancy/while nursing
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
- P333+313 IF skin irritation or a rash occurs: Get medical advice/attention
- P337+313 If eye irritation persists get medical advice/attention
Documents
Certificate of Analysis (CoA) by batch
Enter a lot or batch number to retrieve the CoA for that specific batch. We can generate one from spec data if no PDF is on file.
Synonyms
- Caesium carbonate
- Carbonic acid dicesium
- Carbonic acid, cesium salt
- Carbonic acid, cesium salt (1:2)
- Carbonic acid, dicesium salt
- Cesium carbonate (Cs2CO3)
- Cesium carbonate, 200 mesh
- cesium carbonato
- Cs2CO3
- Dicesium carbonate
Frequently asked questions
What is cesium carbonate primarily used for in industrial and research applications?
Cesium carbonate is commonly used as a strong base in organic synthesis (e.g., for palladium-catalyzed coupling reactions), in semiconductor manufacturing, and as a flux in glass production.
What is the chemical formula and molecular weight of cesium carbonate?
The chemical formula is Cs₂CO₃, and the molecular weight is 325.82 g/mol.
How should cesium carbonate be stored to maintain its purity and safety?
Store in a tightly sealed container at ambient temperature, away from moisture and CO₂ sources, as it is hygroscopic and can react with atmospheric gases.
What purity grade is available for this cesium carbonate, and is it suitable for sensitive applications?
Molekula supplies 99.9% minimum purity cesium carbonate, making it suitable for high-purity applications like semiconductor processing and advanced organic synthesis.
Can Molekula supply cesium carbonate in bulk quantities for large-scale production?
Yes, bulk quantities are available upon request—please contact our sales team for pricing, lead times, and packaging options tailored to your needs.
What documentation is provided with an order of cesium carbonate?
Each order includes a Certificate of Analysis (CoA), Material Safety Data Sheet (MSDS), and a product specification sheet detailing purity, heavy metals, and other critical parameters.
Ready to order or need a custom pack?
Tell us the product, grade, and quantity — Molekula usually responds within one working day with pricing and lead time.