rheniumoxide(re2o7)
dirhenium heptaoxide
CAS: 1314-68-7
Molecular Formula: O7Re2
rheniumoxide(re2o7) - Names and Identifiers
rheniumoxide(re2o7) - Physico-chemical Properties
| Molecular Formula | O7Re2 |
| Molar Mass | 484.41 |
| Density | 6.103g/mLat 25°C(lit.) |
| Melting Point | 220°C(lit.) |
| Boling Point | 360°C(lit.) |
| Flash Point | 360°C |
| Water Solubility | Soluble in water and alcohol. |
| Appearance | Yellow powder |
| Specific Gravity | 6.103 |
| Color | Yellow to pale green |
| Merck | 14,8178 |
| Storage Condition | Inert atmosphere,2-8°C |
| Stability | hygroscopic |
| Sensitive | Moisture Sensitive |
| MDL | MFCD00011199 |
| Use | It is a catalyst for the conversion of sulfur dioxide to sulfur trioxide and nitrous acid to nitric acid. |
rheniumoxide(re2o7) - Risk and Safety
| Hazard Symbols | C - Corrosive |
| Risk Codes | 34 - Causes burns |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S27 - Take off immediately all contaminated clothing. S36/37/39 - Wear suitable protective clothing, gloves and eye/face protection. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) |
| UN IDs | UN 3260 8/PG 3 |
| WGK Germany | 1 |
| FLUKA BRAND F CODES | 3-10-21 |
| TSCA | Yes |
| HS Code | 28259090 |
| Hazard Class | 5.1 |
| Packing Group | III |
rheniumoxide(re2o7) - Introduction
Easy to sublimate, vapor pressure is 0.75Pa at 150 ℃. Very volatile, the gaseous state is yellow and white. It is stable in oxygen, nitrogen and chlorine atmosphere, and dissociates obviously when heated to 600 ℃ in air, and dissociates completely higher than 800 ℃. Easily affected with moisture, hydrolyzed to produce rhenic acid. Soluble in organic solvents such as ethanol, acetone, pyridine and methanol, but insoluble in pure ether and carbon tetrachloride. It is easy to reduce hydrogen, carbon monoxide, sulfur dioxide and other reducing agents to rhenium dioxide and metal rhenium.
Last Update：2022-10-16 17:13:18
rheniumoxide(re2o7) - Reference Information
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| Overview | Rhenium heptaoxide, also known as "rhenium anhydride", is a yellow flake or hexagonal crystal or powder. It has strong hygroscopicity. The melting point is about 297 ℃, the relative density is 6.103, and the sublimation starts at 250 ℃. It is easily soluble in water to form rhenic acid, soluble in acid, alkali, alcohol, acetone, dioxane and pyridine, and is oxidizing. Preparation method: In a closed system, it is obtained by the action of oxygen and rhenium at 400~425 ℃. |
| Use | is a catalyst for the conversion of sulfur dioxide to sulfur trioxide and nitrous acid to nitric acid. |
Last Update：2024-04-10 22:29:15
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