Page 324 - Handbook of Hazardous Chemical Properties

314 PHOSGENE
PHOSGENE
Chemical Designations - Synonym: Carbonyl chloride; Chloroformyl chloride; Chemical Formula:
COCl,.
Observable Characteristics - Physical State (as shipped): Compressed gas; Color: Colorless; Odor:
Sharp, pungent odor in higher concentrations; like new-mown grass in low concentrations.
Physical and Chemical Properties - Physical State at 15 'C and 1 atm.: Gas; Molecular Weight:
98.92; Boiling Point at 1 atm.: 46.8, 8.2, 281.4; Freezing Point: -195, -126, 147; Critical
Temperature: 360, 182, 455; Critical Pressure: 823, 56.0, 5.67; Specific Gravity: 1.38 at 20 "C
(liquid); Vapor (Gas) Specific Gmvity: 3.4; Ratio ofspecific Heats of Vqor (Gas): 1.170; Lutent Heat
of Vaporization: 110, 59, 2.5; Heat of Combustion: Not pertinent; Heat of Decomposition: Not
pertinent.
Health Hazards hformation - Recommended Personal Protective Equipment: Approved by US.
Bureau of Mines respirator; protective clothing; Symptom Following Exposure: Irrigates lungs, causing
delayed pulmonary edema. Slight gassing produces dryness or burning sensation in the throat, numbers,
pain in the chest, bronchitis, and shortness of breath; Geneml Treatment for Exposure: INHALATION:
remove victim from contaminated area; enforce absolute rest; call a doctor; Toxicity by Inhalm*on
(Threshold Limit Value): 0.1 ppm; Short-Tern Inhalation Limits: 1 ppm for 5 min.; Toxicity by
Ingestion: Data not available; Late Toxicity: Severe delayed pulmonary edema; Vapor (Gas) Irritant
Characteristics: Vapors cause severe irritation of eyes and throat and can cause eye and lung injury.
They cannot be tolerated even at low concentrations; Liquid or Solid Irritant Chamcteristics: Severe
irritant to all tissues; Odor i%reshoM: 0.5 ppm.
Fire Hazards - Flash Point : Not flammable; Flammable Limits in Air (96): Not flammable; Fire
Extinguishing Agents: Water to cool containers; Fire Extinguishing Agents Not to be Used: Not
pertinent; Special Hazarak of Combustion Products: Toxic gas is generated when heaa Behavior in
Fire: Not pertinent; Ignition Temperature : Not flammable; Electrical Hazard Not pertinent; Burning
Rate: Not flammable.
Chemical Reactivity - Reactivity with Water: Decomposes, but not vigorously; Reactivity nith
Common Materials: No reaction; Stability During Tmport: Stable; Neutralizing Agents for Aci& and
Caustics: Can be absorbed in caustic soda solution. One ton of phosgene requires 2,480 lbs. of caustic
soda dissolved in 1000 gal. of water; Polymerization: Not pertinent; Inhibitor ofPolymerizacion: Not
pertinent.

PHOSPHORIC ACID
Chemical Designations - Synonym: Orthophosphoric acid; Chemical Fonnula: H3P04.
Observable Characteristics - PhysicaZ State (as shipped) : Liquid; Color: Colorless; Odor: Odorless.
Physical and Chemical Properties - Physical State at 15 "c and I atm. : Liquid; Molecular Weight:
98.00; Boiling Point at 1 atm.: >266, > 130, >403; Freezing Point: Not pertinent; Critical
Tempemture: Not pertinent; Critical Pressure: Not pertinent; @ec.ij'ic Gravity: 1 .892 at 25 "C (liquid);
Vapor (Gas) Specific Gmvity: Not pertinent; Ratio of Specific Heats of Vapor (Gas): Not pertinent;
Latent Heat of Vaporim.on: Not pertinent; Heat of Combustion: Not pertinent; Heat ofDecomposition:
Not pertinent.
Health Hazards Information -Recommended Personal Protective Equipment: Goggles or face shield;
rubber gloves and protective clothing; Symptoms Following Exposure: Burns on mouth and lips, sour
acrid taste, severe gastrointestinal irritation, MUS-, vomiting, bloody diarrhea, difficult swallowing,
severe abdominal pains, thirst, acidemia, difficult breathing, convulsion, collapse, shock, death;
General Treatment for Exposure: INGESTION: do NOT induce vomiting; give water, milk, or
vegetable oil. SKIN OR CONTACT: flush with water for at least 15 min.; Toxicity by Inhalation
(ThresholdLim't Value): 1 .O mg/m3; Short-Tern InhalationLimits: Not pertinent; Toxicity by Ingestion:
Grade 3, LD, 50 to 500 mg/kg; Late Toxicity: None; Vapor (Gas) Im'tant Chamcteristics: Not
volatile; Liquid or Solid Irritant Characteristics: Fairly severe skin irritant; may cause pain and second-
degree burns after a few minutes contact; Odor 7hreshoM: Not pertinent.
Ere Hazards - Flash Point : Not flammable; Flammable Limits in Air (96): Not flammable; Fire