IUPAC Name: Uranium
Molecular Formula: U
Molecular Weight: 238.03 g/mol
Canonical SMILES: [U]
InChI: InChI=1S/U
EINECS: 231-170-6
Product Categories: Inorganics; Heterocyclic Compounds; Heterocycles; Intermediates & Fine Chemicals; Isotope Labeled Compounds; Pharmaceuticals
Melting Point: 314-316 °C (dec.)
Boiling point: 4131 °C,
density of Uranium (CAS NO.7440-61-1): 1.01 g/mL at 25 °C

The discovery of uranium is credited to the German chemist Martin Heinrich Klaproth. While he was working in his experimental laboratory in Berlin in 1789, Klaproth was able to precipitate a yellow compound by dissolving pitchblende in nitric acid and neutralizing the solution with sodium hydroxide. Klaproth mistakenly assumed the yellow substance was the oxide of a yet-undiscovered element and heated it with charcoal to obtain a black powder, which he thought was the newly discovered metal itself (in fact, that powder was an oxide of uranium).
In 1841, Eugène-Melchior Péligot isolated the first sample of uranium metal by heating uranium tetrachloride with potassium.
In 1896, Antoine Henri Becquerel discovered radioactivity by using uranium.
In 1934., a team led by Enrico Fermi observed that bombarding uranium with neutrons produces the emission of beta rays.
On 2 December 1942, as part of the Manhattan Project, another team led by Enrico Fermi was able to initiate the first artificial nuclear chain reaction, Chicago Pile-1.
On 20 December 1951, the Experimental Breeder Reactor I at the Idaho National Laboratory (INL) near Arco, Idaho became the first nuclear reactor to create electricity.
The world's first commercial scale nuclear power station, Obninsk in the Soviet Union, began generation with its reactor AM-1 on 27 June 1954. Other early nuclear power plants were Calder Hall in England which began generation on 17 October 1956 and the Shippingport Atomic Power Station in Pennsylvania which began on 26 May 1958. Nuclear power was used for the first time for propulsion by a submarine, the USS Nautilus, in 1954.

 Uranium (CAS NO.7440-61-1) is used as a colorant in uranium glass, producing orange-red to lemon yellow hues. It was also used for tinting and shading in early photography and used in photographic chemicals. Uranium metal is used for X-ray targets in the making of high-energy X-rays. The major application of Uranium in the military sector is in high-density penetrators.

Reported in EPA TSCA Inventory.

Hazard Codes: T+
Risk Statements: 20-34-53-33-26/28 
R20:Harmful by inhalation. 
R34:Causes burns. 
R53:May cause long-term adverse effects in the aquatic environment. 
R33:Danger of cumulative effects. 
R26/28:Very toxic by inhalation and if swallowed.
Safety Statements: 26-36/37/39-45-61-20/21 
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. 
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.) 
S61:Avoid release to the environment. Refer to special instructions / safety data sheets. 
S20:When using, do not eat or drink. 
S21:When using do not smoke.
RIDADR: UN 3264 8/PG 3
WGK Germany: 3
HazardClass: 7
PackingGroup: Commercial

OSHA PEL: TWA Soluble Compounds: 0.05 mg(U)/m³; Insoluble Compounds 0.2 mg(U)/m³; STEL 0.6 mg(U)/m³
ACGIH TLV: TWA 0.2 mg(U)/m³; STEL 0.6 mg(U)/m³
DFG MAK: 0.25 mg/m³
DOT Classification:  7; Label: RADIOACTIVE, SPONT Combustible

  Uranium (CAS NO.7440-61-1), its Synonyms are HSDB 2553 ; Uranium ; Uranium I ((238)U) ; Uranium, isotope of mass 238 ; Uranium, radioactive ; Uranium-238 . It is silver-gray radioactive metal.