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| CAS No.: | 7791-26-6 |
|---|---|
| Name: | URANYL CHLORIDE |
| Molecular Structure: | |
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| Formula: | Cl2O2U |
| Molecular Weight: | 340.90 |
| Synonyms: | uranyl chloride; |
| Density: | 1.0591 g/cm3(Temp: 25 °C) |
| Melting Point: | 577°C |
| Boiling Point: | decomposes [CRC10] |
| Solubility: | very soluble H2O; soluble acetone, alcohol; insoluble benzene [MER06] |
| Safety: | Poison by intraperitoneal route. A radioactive material. When heated to decomposition it emits toxic fumes of Cl−. See also URANIUM. |
| PSA: | 34.14000 |
| LogP: | 1.14140 |
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Chemistry
Chemistry informtion about Uranyl Chloride (CAS NO.7791-26-6) is:
Synonyms: Uranyl Chloride;Dichlorodioxy-Uranium(6+;Dichlorodioxouranium
MF: Cl2O2U
MW: 340.93
EINECS: 232-246-1
Following is the molecular structure of Uranyl Chloride (CAS NO.7791-26-6) is:
History
Uranyl chloride, and its two hydrates (UO2Cl2·H20 and UO2Cl2·3H20) decomposes in the presence of light, a fact discovered by Adolph Gehlen in 1804, This photosensitivity periodically attracted scientific curiosity and various unsuccessful attempts to develop photographic applications using the salts. As with most other uranic species this compound also exhibits fluorescence.
Toxicity Data With Reference
| Organism | Test Type | Route | Reported Dose (Normalized Dose) | Effect | Source |
|---|---|---|---|---|---|
| mouse | LD50 | intraperitoneal | 7057ug/kg (7.057mg/kg) | Comptes Rendus Hebdomadaires des Seances, Academie des Sciences. Vol. 256, Pg. 1043, 1963. |
Consensus Reports
Reported in EPA TSCA Inventory.
Safety Profile
Poison by intraperitoneal route. A radioactive material. When heated to decomposition it emits toxic fumes of Cl−. See also URANIUM.
RIDADR: 2912
HazardClass: 7
Standards and Recommendations
OSHA PEL: TWA 0.05 mg(U)/m3
ACGIH TLV: TWA 0.2 mg(U)/m3; STEL 0.6 mg(U)/m3
Analytical Methods
The company Indian Rare Earths Limited (IREL) has developed a process to extract uranium from the Western and Eastern coastal dune sands of India. After pre-processing with high intensity magnetic separators and fine grinding, the mineral sands (known as monazite), are digested with caustic soda at about 120C and water. The hydroxide concentrate is further digested with concentrated hydrochloric acid to solubilise all hydroxides to form a feed solution composed of chlorides of uranium and other rare earth elements including thorium. The solution is subjected to solvent extraction with dual solvent systems to produce uranyl chloride and thorium oxalate. The crude uranyl chloride solution is subsequently refined to nuclear grade ammonium diuranate by a purification process involving precipitation and solvent extraction in a nitrate media. Uranyl chloride is formed when chlorine gas is passed over uranium dioxide at a red heat. However it is more usually obtained by dissolving uranium oxide in hydrochloric acid and evaporating.
Specification
Uranyl Chloride (CAS NO.7791-26-6) is an unstable, bright yellow coloured chemical compound of uranium. It forms large sand-like crystals which are highly soluble in water, alcohols and ethers. Uranyl chloride is spectacularly toxic by inhalation and if swallowed. There is also a danger of cumulative effects. The target organs are the liver and kidneys. It is toxic to aquatic organisms, and may cause long-term adverse effects in the aquatic environment. As with all compounds of uranium it is radioactive to a degree dependent on its isotopic ratios.