Cesium bromide, pure
Cesium bromide
CAS: 7787-69-1
Molecular Formula: BrCs
Cesium bromide, pure - Names and Identifiers
| Name | Cesium bromide |
| Synonyms | Cesium bromide caesium bromide Cesium bromide, pure Cesiumbromidewhitextl cesium bromide, ultra dry Cesium bromide (metals basis) |
| CAS | 7787-69-1 |
| EINECS | 232-130-0 |
| InChI | InChI=1/BrH.Cs/h1H;/q;+1/p-1 |
Cesium bromide, pure - Physico-chemical Properties
| Molecular Formula | BrCs |
| Molar Mass | 212.81 |
| Density | 4.44 g/mL at 25 °C (lit.) |
| Melting Point | 636 °C (lit.) |
| Boling Point | 1300 °C |
| Flash Point | 1300°C |
| Water Solubility | 55 g/100 mL (20 ºC) |
| Solubility | H2O: 3M at20°C, clear, colorless |
| Vapor Presure | 20200mmHg at 25°C |
| Appearance | beads |
| Specific Gravity | 4.44 |
| Color | White |
| Merck | 14,2009 |
| Storage Condition | RT, argon filled storage |
| Stability | Stable. |
| Sensitive | Hygroscopic |
| Refractive Index | 1.6984 |
| MDL | MFCD00010954 |
| Use | Analytical reagents, X-ray fluorescent screen. The prism of the spectrometer, etc. |
Cesium bromide, pure - Risk and Safety
| Hazard Symbols | Xi - Irritant |
| Risk Codes | 36/37/38 - Irritating to eyes, respiratory system and skin. |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36 - Wear suitable protective clothing. |
| WGK Germany | 3 |
| RTECS | FK9275000 |
| TSCA | Yes |
| HS Code | 28275900 |
| Toxicity | LD50 i.p. in rats: 1.4 g/kg (Cochran) |
Cesium bromide, pure - Reference Information
Open Data Unverified Data
| NIST chemical information | information provided by: webbook.nist.gov (external link) |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| solubility in water (g/100ml) | grams dissolved per 100ml of water: 108g/20 ℃ |
| Use | analytical reagent, X-ray fluorescence screen. Prism of Spectrometer, etc. |
| production method | cesium carbonate is mainly neutralized with hydrobromic acid; Cesium iodide is treated with hydrobromic acid in the presence of hydrogen peroxide, recrystallized in water, etc. More commonly, 16.17G of cesium sulfate and 14.36G of barium bromide (slight excess) are mixed, water is added and heated. After filtration, the filtrate was evaporated to dryness and the red-hot residue was treated with water and recrystallized. The obtained small grains were stored in a sulfuric acid vacuum dryer. There is also a way to prepare a pure product, the aluminum aluminum containing cesium dissolved in water, with ammonia into cesium sulfate, hot filter to remove aluminum. The sulfate was placed with a slight excess of barium hydroxide, excess barium was precipitated by carbon dioxide, and the barium sulfate and barium carbonate were completely precipitated by standing overnight. After filtration, the filtrate containing Cesium hydroxide was taken up into a platinum dish and neutralized with hydrobromic acid. Pure cesium bromide was obtained by recrystallization. This pure white cesium bromide was heated at 150 °c for 8H, dissolved in water, precipitated with pure concentrated hydrobromic acid and filtered. It is melted in a nitrogen atmosphere or a hydrogen bromide atmosphere, cooled in pure nitrogen, and stored in a desiccator of potassium hydroxide. |
| category | toxic substances |
| toxicity grade | poisoning |
| Acute toxicity | intraperitoneal-rat LD50: 1400 mg/kg |
| flammability hazard characteristics | toxic bromide fumes from thermal decomposition |
| storage and transportation characteristics | low temperature ventilation and drying |
| fire extinguishing agent | water, carbon dioxide, foam, dry powder |
Last Update：2024-04-09 19:43:38
Cesium bromide, pure - Introduction
It is hygroscopic., Easily soluble in water, soluble in ethanol, almost insoluble in acetone.
Last Update：2022-10-16 17:28:49
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