What is Cesium Carbonate CAS 534-17-8?

CAS 534-17-8 is cesium carbonate, also written caesium carbonate or dicesium carbonate, with the molecular formula Cs2CO3. It is a white, highly deliquescent crystalline powder with strong basicity and good solubility in many organic reaction systems.

Why is cesium carbonate used in cross-coupling reactions?

It acts as a mild but effective inorganic base in reactions such as Suzuki, Heck, Sonogashira, and Ullmann coupling. Its high solubility in organic solvents and strong basicity can improve reaction homogeneity, conversion, and selectivity in complex pharmaceutical and fine-chemical synthesis.

What are the main electronic-material applications of Cs2CO3?

Cesium carbonate is used as an interface or electron-injection material in OLEDs, organic field-effect transistors, and organic or perovskite solar cells. In these devices it helps modify work function and improve charge injection and device efficiency.

How does electronic grade differ from industrial grade cesium carbonate?

Electronic grade is controlled more tightly for trace alkali and metal impurities such as sodium, potassium, rubidium, calcium, iron, and magnesium. Industrial grade may still be used in organic synthesis, while electronic-grade material is preferred for sensitive optoelectronic and perovskite applications.

How should cesium carbonate be stored and handled?

It is highly hygroscopic and should be kept in tightly sealed, moisture-proof packaging. Store in a dry area, minimize air exposure, and use inert-gas protection for long-term storage. Standard chemical handling and dust-control practices should be followed.

Cesium Carbonate CAS 534-17-8

Cesium carbonate, also called caesium carbonate, CAS 534-17-8, is a white, highly deliquescent crystalline base supplied for organic synthesis, electronic materials, energy technologies, and specialty glass. Confirm the required grade and specification, then request a quotation with COA/TDS/SDS for bulk supply.

CAS: 534-17-8
Synonyms: Dicesium carbonate, Carbonic acid dicesium salt, Caesium carbonate, Cesium(I) carbonate
Einecs: 208-591-9
Molecular Formula: Cs2CO3
Grade: Industrial Grade / Electronic Grade
Package: 25kg/drum, 5kg/tin, or 1kg/vacuum bottle (Specialized moisture-proof packaging)

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Product Description

Cesium Carbonate CAS 534-17-8, also called caesium carbonate, is an inorganic base with the molecular formula Cs2CO3 and EINECS 208-591-9.

Synonyms: Dicesium carbonate; Carbonic acid dicesium salt; Caesium carbonate; Cesium(I) carbonate.

CAS: 534-17-8.

Molecular formula: Cs2CO3.

It is a white crystalline, highly deliquescent powder with molecular weight 325.82 g/mol and density about 4.07 g/cm³.

The melting point is about 610 °C (decomposes), and water solubility is about 261 g/100 mL at 20 °C.

It is soluble in ethanol, DMF, and DMSO, with very high hygroscopicity and a refractive index of about 1.626.

In organic synthesis it is an effective base for Suzuki, Heck, Sonogashira, and Ullmann cross-coupling reactions.

In OLEDs it is an electron-injection layer material or dopant that lowers operating voltage and improves device efficiency.

In energy technologies it is used for perovskite solar cells and advanced fuel-cell solid electrolytes.

In specialty glass it is a critical additive for optical glasses and fiber optics, modifying refractive index and transmission stability.

Store in tightly sealed, moisture-proof packaging in a dry area; use inert gas (nitrogen or argon) for long-term storage of opened containers.

Keep away from strong acids and oxidizing agents; transfer in a dry room or glovebox for ultra-low-moisture applications.

Use chemical-safety goggles, nitrile or neoprene gloves, and a NIOSH-approved particulate respirator during bulk handling.

Every lot is profiled by ICP-MS to quantify trace alkali-metal impurities (Na, K, Rb) to parts-per-million levels.

Climate-controlled packaging and vacuum sealing preserve free-flowing morphology and catalytic efficacy from factory to reactor.

Confirm appearance, purity, trace alkali metals, moisture, packaging, and grade as required.

The page is an RFQ entry point and does not state stock, price, MOQ, or fixed lead time.

For an RFQ, state the intended application, required grade, quantity, packaging, destination, and document needs.

FAQ - Technical & Supply Chain

Q:
What is Cesium Carbonate CAS 534-17-8?

A: CAS 534-17-8 is cesium carbonate, also written caesium carbonate or dicesium carbonate, with the molecular formula Cs2CO3. It is a white, highly deliquescent crystalline powder with strong basicity and good solubility in many organic reaction systems.
Q:
Why is cesium carbonate used in cross-coupling reactions?

A: It acts as a mild but effective inorganic base in reactions such as Suzuki, Heck, Sonogashira, and Ullmann coupling. Its high solubility in organic solvents and strong basicity can improve reaction homogeneity, conversion, and selectivity in complex pharmaceutical and fine-chemical synthesis.
Q:
What are the main electronic-material applications of Cs2CO3?

A: Cesium carbonate is used as an interface or electron-injection material in OLEDs, organic field-effect transistors, and organic or perovskite solar cells. In these devices it helps modify work function and improve charge injection and device efficiency.
Q:
How does electronic grade differ from industrial grade cesium carbonate?

A: Electronic grade is controlled more tightly for trace alkali and metal impurities such as sodium, potassium, rubidium, calcium, iron, and magnesium. Industrial grade may still be used in organic synthesis, while electronic-grade material is preferred for sensitive optoelectronic and perovskite applications.
Q:
How should cesium carbonate be stored and handled?

A: It is highly hygroscopic and should be kept in tightly sealed, moisture-proof packaging. Store in a dry area, minimize air exposure, and use inert-gas protection for long-term storage. Standard chemical handling and dust-control practices should be followed.

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