Molekula
Cesium carbonate
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 is an inorganic compound widely used as a strong base in organic synthesis, particularly in palladium-catalyzed coupling reactions like Suzuki reactions. Its documented applications also include catalysing ethylene oxide polymerization, serving as a coating component for spatter-free CO2 welding of steel, and use in oxide cathodes. It is also employed in semiconductor manufacturing and as a pH regulator in chemical processes. Cesium carbonate has a CAS number of 534-17-8, with the molecular formula Cs₂CO₃ and a molecular weight of 325.82 g/mol. It should be stored at ambient conditions and handled with caution, as it carries a "Danger" signal word. 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
These pack sizes aren't a limit. Molekula manufactures, sources and repacks to order — if you need 500 kg and only see 1 kg listed, . We quote from grams to multi-tonne.
Need a different size? Add the nearest pack and change the size in your basket — we price it at the same rate per unit.
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100 g — $134.10 per pack
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1 kg — $758.60 per pack
Need a different quantity or pack?
Tell us how much you need and when — drums, IBCs, sacks or a one-off bulk lot. We'll manufacture or source it and come back with a price.
Prices exclude VAT/sales tax and shipping.
Specifications
| Property | Value |
|---|---|
| Appearance | White to Off-white powder |
| Loss on Ignition | ≤ 0.5% (@ 200 °C) |
| Loss on Drying | ≤ 0.5% (@ 500 °C) |
| Assay | ⩾ 99.0% |
| Iron (Fe) | ≤ 0.0005% |
| Lead (Pb) | ≤ 0.0005% |
| Calcium (Ca) | ≤ 0.003% |
| Magnesium (Mg) | ≤ 0.0005% |
| Potassium (K) | ≤ 0.005% |
| Sodium (Na) | ≤ 0.005% |
| Aluminium (Al) | ≤ 0.005% |
| Lithium (Li) | ≤ 0.0005% |
| Rubidium (Rb) | ≤ 0.02% |
| 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 | 86852479 |
| 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
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Corrosive
GHS05
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Health Hazard
GHS07
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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
Safety Data Sheets (SDS)
Available in English, French, German, Italian, Russian, Spanish.
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 commonly used for?
Cesium carbonate is primarily used as a strong base in organic synthesis, particularly in palladium-catalyzed cross-coupling reactions like Suzuki couplings, and as a reagent in the preparation of fine chemicals and pharmaceuticals.
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?
Store cesium carbonate in a tightly sealed container at **ambient temperature**, away from moisture and incompatible substances.
What grades of cesium carbonate does Molekula supply?
Molekula supplies **reagent-grade cesium carbonate**, suitable for high-purity applications in research and synthesis.
Can Molekula supply cesium carbonate in bulk quantities?
Yes, Molekula can supply cesium carbonate in bulk, with quantities tailored to meet your specific requirements—please contact us for pricing and availability.
What documentation comes 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 relevant 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.