Molekula
Caesium chloride
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
Caesium chloride is an inorganic compound composed of caesium and chloride ions, widely used in molecular biology for DNA/RNA density gradient ultracentrifugation, protein crystallization, and as a reference standard in analytical chemistry. It is also used in X-ray fluorescent screens, as a radiographic contrast medium, as a phase-transfer catalyst, and as a raw material in caesium production. It appears as a white, hygroscopic crystalline solid with high solubility in water. This chemical has a CAS number of 7647-17-8, a molecular formula of ClCs, and a molecular weight of 168.36 g/mol. It should be stored at ambient conditions and handled with caution, as it carries a signal word of "Warning." Molekula supplies caesium chloride 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.
-
100 g — $106.20 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 crystal |
| Assay | 99% min |
| Iron (Fe) | <0.001% |
| Lead (Pb) | <0.001% |
| Calcium (Ca) | <0.005% |
| Magnesium (Mg) | <0.001% |
| Potassium (K) | <0.02% |
| Sodium (Na) | <0.02% |
| Aluminium (Al) | <0.001% |
| Lithium (Li) | <0.001% |
| Rubidium (Rb) | <0.5% |
| Silicon Dioxide (SiO2) | 0.001% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Acid |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Appearance | Colorless crystals |
| Melting Point | 646 °C |
| Boiling Point | 1290 °C (sublimes) |
| Solubility (other solvents) | Soluble in ethanol |
Source: PubChem CID 24293 (HSDB)
Identification
| Property | Value |
|---|---|
| SKU | 57695318 |
| CAS Number | 7647-17-8 |
| IUPAC Name | cesium chloride |
| EC Number | 231-600-2 |
| Molecular Formula | ClCs |
| Molecular Weight | 168.36 |
| Exact Mass | 167.8743 |
| SMILES | [Cl-].[Cs+] |
| InChIKey | AIYUHDOJVYHVIT-UHFFFAOYSA-M |
| InChI | InChI=1S/ClH.Cs/h1H;/q;+1/p-1 |
| PubChem CID | 24293 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| Tariff Code | 28273985 EXP 2827398590 IMP |
Safety & GHS
-
Serious Health Hazard
GHS08
Hazard statements
- H361 Suspected of damaging fertility or the unborn child
Precautionary statements
- P201 Obtain special instructions before use
- P263 Avoid contact during pregnancy/while nursing
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P308+313 IF exposed or concerned: Get medical advice/attention
Documents
Safety Data Sheets (SDS)
Available in English, English (US), French, German, Italian, 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(I) chloride
- CESIUM CHLORIDE
- Cesium chloride (CsCl)
- Cesium chloride, ultra dry
- Cesium monochloride
- Cesium Muriaticum
- cesium(I) chloride
- CsCl
- Dicesium dichloride
- Tricesium trichloride
Frequently asked questions
What is caesium chloride primarily used for?
Caesium chloride is commonly used in molecular biology for **density gradient ultracentrifugation** (e.g., DNA/RNA purification) and as a **contrast agent in X-ray crystallography** due to its high atomic weight.
What is the molecular formula and molecular weight of caesium chloride?
The molecular formula is **ClCs** (or **CsCl**), and the molecular weight is **168.36 g/mol**.
How should caesium chloride be stored?
Store caesium chloride in a **tightly sealed container at ambient temperature**, away from moisture and incompatible substances.
What grades of caesium chloride does Molekula supply?
Molekula supplies **analytical and reagent grades** of caesium chloride, suitable for laboratory and research applications.
Can Molekula supply caesium chloride in bulk quantities?
Yes, Molekula can supply caesium chloride in **bulk quantities**—please contact us for custom packaging and pricing.
What documentation comes with a caesium chloride order?
Each order includes a **Certificate of Analysis (CoA)**, **Material Safety Data Sheet (MSDS)**, and **batch-specific documentation** for traceability.
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.