Cesium hydroxide , 50 , 21351-79-1
CAS NO.：21351-79-1
Empirical Formula: CsHO
Molecular Weight: 149.91
MDL number: MFCD00149664
EINECS: 244-344-1
PRODUCT Properties
| Melting point: | 272 °C(lit.) |
| Density | 3.68 g/mL at 25 °C(lit.) |
| solubility | Miscible with ethanol. |
| pka | 11.6[at 20 ℃] |
| form | Liquid |
| color | Colorless |
| Water Solubility | soluble |
| Sensitive | Air Sensitive |
| Merck | 13,2022 |
| Exposure limits | PC-TWA:2 mg/m3 |
| Stability: | Stable. Incompatible with acids. Absorbs carbon dioxide from the air. |
| InChI | 1S/Cs.H2O/h;1H2/q+1;/p-1 |
| InChIKey | HUCVOHYBFXVBRW-UHFFFAOYSA-M |
| SMILES | [OH-].[Cs+] |
| CAS DataBase Reference | 21351-79-1(CAS DataBase Reference) |
| NIST Chemistry Reference | Cesium hydroxide(21351-79-1) |
| EPA Substance Registry System | Cesium hydroxide (21351-79-1) |
Description and Uses
Cesium Hydroxide, as a water-soluble source of cesium, is typically found in any of several hydrate forms. Its applications are relatively limited due to its volatility and high basicity – corroding glass – as well as the high cost of cesium extraction. These applications include use as an electrolyte in alkaline batteries, particularly below the freezing point of water, in color photography, and as a catalyst for synthesis of organics such as phenylacetylene and polymers. Furthermore, it also finds use as a precursor in the manufacture of cesium salts.
Cesium hydroxide is used in the preparation of porous cesium titanosilicates, which are potential ion-exchange materials utilized for radioactive wastes cleaning purpose. It is also involved in the preparation of other cesium salts. Further, it is used as an electrolyte in alkaline storage batteries and as a catalyst in organic synthesis. In addition to this, it is used in color photography.
Safety
| Symbol(GHS) |    GHS05,GHS07,GHS08 |
| Signal word | Danger |
| Hazard statements | H302-H314-H318-H361-H373 |
| Precautionary statements | P264-P270-P260-P280-P201-P202-P301+P312-P330-P301+P330+P331-P303+P361+P353-P363-P304+P340-P310-P305+P351+P338-P308+P313-P314-P405-P501 |
| Hazard Codes | C |
| Risk Statements | 22-35-34 |
| Safety Statements | 26-36/37/39-45-37/39-27-28 |
| OEB | B |
| OEL | TWA: 2 mg/m3 |
| RIDADR | UN 2682 |
| WGK Germany | 3 |
| F | 3 |
| TSCA | TSCA listed |
| HazardClass | 8 |
| PackingGroup | II |
| HS Code | 28259090 |
| Storage Class | 8A - Combustible corrosive hazardous materials |
| Hazard Classifications | Acute Tox. 4 Oral Skin Corr. 1B |
| Hazardous Substances Data | 21351-79-1(Hazardous Substances Data) |
| Toxicity | LD50 i.p. in rats: 100 mg/kg (Cochran) |
| REACH Registrations | Active |
