Page 397 - Handbook of Hazardous Chemical Properties

UREA 387

of sodium bicarbonate.(This will convert the uranium salt lo the bicarbonate, which is much less toxic.)
Additional treatment is symptomatic get medical attention; Toxicity by Inhalation (Threshold Limit
Value): 0.05 mg/m3; Short-Term Exposure Limits: Data not available; Toxicity by Ingestion: Grade 3,
LD,,50 to 500 mg/kg; Late Toxicity: Delayed inflammation of kidneys. Airborne radioactive particles
have apparent been responsible for a significantly increased death rate from lung cancer among long-
term uranium miners; Vapor (Gas) Irritant Characteristics: Data not available; Liquid or Solid Irritant
Characteristics: Data not available; Odor Threshold: Not pertinent.
Fire EIazards - Fhh Point: Not flammable but may cause fire on contact with combustible materials;
Flammable Limits in Air (96): Not flammable; Fire Extinguishing Agents: Apply flooding amounts of
water; Fire Extinguishing Agents Not to be Used: Not pertinent; Special Hazards of Combustion
Products: Toxic oxides of nitrogen are formed in fires; Behavior in Fire: Intensifies fires. When large
quantities are involved, nitrate may fuse or melt. The application of water may then cause extensive
scattering of the molten material; Ignition Temperature : Not pertinent; Electrical Hazard Not
pertinent; Burning Rate: Not pertinent.
Chemical Reactivity -Reactivity with Water: Dissolves in water forming a weak solution of nitric acid.
The reaction is nonhazardous; Reactivity with Common Materials: When in contact with easily
oxidizable materials, this chemical may react rapidly enough to cause ignition, violent combustion, or
explosion. Water solutions are acidic and can corrode metals; Stability During Transport: Stable;
Neutmlizing Agents forAcids and Caustics: Flush with water; Polymerizalion: Not pertinent; Inhibitor
of Polymerization: Not pertinent.
URANYL SULFATE
Chemical Designations - Synonyms: Uranium sulfate; Uranium sulfate trihydrate; Uranyl sulfate
trihydrate; Chemical Formula: U0,S0,-3Hz0.
Observable Characteristics - Physical State (as nonnally shipped): Solid; Color: Yellow; Odor: None.
Physical and Chemical Properties - Physical State at 15 "c and I am. : Solid; Molecular Weight:
420.2; Boiling Point at 1 ann. : Not pertinent (decomposes); Freezing Point: Not pertinent; Critical
Tempemre: Not pertinent; Critical Pressure: Not pertinent; Specijic Gravity: 3.28 at 20 "C (solid);
Vapor (Gas) Density: Not pertinent; Ratio ofSpecific Heats of Vapor (Gas): Not pertinent; Latent Heat
of Vaporizalion: Not pertinent; Heat of Combustion: Not pertinent; Heat of Decomposition: Not
pertinent.
Health Hazards Information - Recommended Personal Protective Equipment: Approved dust
respirator; goggles or face shield; protective clothing; Symptoms Following Exposure: irritates eyes and
skin, stomach; Geneml Treannent for mosure: Get medical attention after all exposure to this
compound. INGESTION give large amounts of water; induce vomiting. EYES: flush with water for
at least 15 min. SKIN: flush with water; Toxicity by Inhalation (ThresholdLimit Value): 0.2 mg/m3 (as
uranium); Short-Term Exposure Limits: Data not available; Toxicity by Ingestion: Grade 1, LD,, 5-15
g/kg; Late Toxicity: Data not available; Vapor (Gas) Irritant Characteristics: Data not available; Liquid
or Solid Im'tant Characteristics: Data not available; Odor XJareshold: Data not available.
Fire Hazards - Flash Point : Not flammable; Flammable Limits in Air 1%): Not flammable; Fire
Extinguishing Agents: Not pertinent; Fire Extinguishing Agents Not to be Used: Not pertinent; Special
Hazards of Combustion Products: No data; Behavior in Fire: No data; Ignition Temperature : Not
pertinent; Electrical Hazard Not pertinent; Burning Rate: Not pertinent.
Chemical Reactivity -Reactivity with Water: No reaction; Reactivity with Common Materials: No data;
Stability During Transport: Stable; Neutralizing Agents for Acidr and Caustics: Not pertinent;
Polymrim'on: Not pertinent; Inhibitor of Polymerization: Not pertinent.

UREA
Chemical Designations - Synonym: Carbamide, Carbonyldiamide; Chemical Formula: NHzCONHz,
Observable Characteristics - Physical State (as nonnally shipped): Solid; Color: White; Odor:
Odorless, or slight ammonia odor.
Physical and Chemical Properties - Physical State at 15 "c and 1 atm. : Solid; Molecular Weight: