Page 108 - Handbook of Hazardous Chemical Properties

98 CYANOGEN BROMIDE
Colorless; Odor: Characteristic almond-like; pungent, penetrating; may not be sufficiently strong to
provide an adequate warning.
Physical and Chemical Properties - Physical State at 15 rand I atm. : Gas; Molecular Weight: 52.0;
Boiling Point at I atm.: -6.1, -21.1,252.1; Freezing Point: -18.2, -27.9,245.3; Critical Temperature:
259.9, 126.6, 399.8; Critical Pressure: 857, 58.2, 5.91; Specific Gravity: 0.954 at -21°C (liquid);
Vapor (Gas) Density: 1.8; Ratio of Specijic Heats of Vapor (Gas): 1.205 at 25°C; Latent Heat of
Vaporization: 200, 111, 4.65; Heat of Combustion: -9.059, -5.033, -210.6; Heat of Decomposition:
Not pertinent.
Health Hazards Information -Recommended Personal Protective Equipmnt: Self-contained breathing
apparatus; rubber gloves; rubber protective clothing; rubber-soled shoes; Symptoms Following
Exposure: Vapor irritates eyes and causes giddiness, headache, fatigue, and MU= if inhaled; General
Treatment for Exposure: In general, treatment is similar to that used following exposure to hydrogen
cyanide. INHALATION: move victim to fresh air and let him lie down; do not permit him to exert
himself; remove contaminated clothing but keep patient covered and comfortably warm; summon a
physician; break an amyl nitrite pearl in a cloth and hold it lightly under the victim’s nose for 15
seconds; repeat five times at about 15 sec. Intervals; use artificial respiration if breathing has stopped.
EYES: flush with water for at least 15 min, Toxicity by Inhalation (ThresholdLimit Value): 10 ppm;
Short-Tern Exposure Limits: 5 mgh, for 30 sec; Toxicity by Ingestion: Data not available; Late
Tmicity: Data not available; Vapor (Gas) Im’tant Characteristics: Data not available; Liquid or Solid
Irritant Characteristics: Data not available; Odor Threshold: Data not available.
Fire Hazards - Flash Point : Flammable gas; Flammable Limits in Air (96): 6.6 - 43; Fire
Extinguishing Agents: Let fire burn, shut off flow of gas, cool exposed areas with water; Fire
Extinguishing Agents Not To Be Used Not pertinent; Special Hazardr of Combustion Products:
Unburned vapors are highly toxic; Behavior in Fire: Vapor is heavier than air and may travel
considerable distance to a source of ignition and flash back; Ignition Temperature : Data not available;
Electrical Hazard data not available; Burning Rate: No data.
Chemical Reactivity -Reactivity with Water: No reaction, but water, provides heat to vaporize liquid
cyanogen; Reactivity with Comn Materials: No reaction; Stability During Transport: Stable;
Neutralizing Agents for Acih and Caustics: Not pertinent; Polymerization: Not pertinent; Inhibitor of
Polymerization: Not pertinent.

CYANOGEN BROMIDE
Chemical Designations - Synonyms: No common synonyms; Chemical Fonnula: BrCN.
Observable characteristics - Physical State (as normally shipped): Solid; Color: Colorless; Odor: Pe-
netrating.
Physical and Chemical Properties - Physical State at15 “c and I atm. : Solid; Molecular Weight:
105.93; Boiling Point at I atm.: Not pertinent; Freezing Point: 120 to 124, 49 to 51, 322 to 324;
Critical Temperature: Not pertinent; Critical Pressure: Not pertinent; Specific Gravity: 2.015 at 20°C;
Vapor (Gas) Density: 3.6; Ratio of Specific Heats of Vapor (Gas): Not pertinent; Latent Heat of
Vaporization: Not pertinent; Heat of Combustion: Not pertinent; Heat ofDecomposition: Not pertinent.
Health Hazards Information - Recommended Personal Protective Equipment: Chemical cartridges
respirator, goggles, protective clothing, rubber gloves; Symptoms Following Eyposure: Same symptoms
as hydrogen cyanide. Because it irritates the eyes, throat, and lungs severely, it is unlikely that anyone
would voluntarily remain in areas with a high enough concentration to exert a cyanide effect; General
Treatment for Exposure: Call a physician. INHALATION remove victim to fresh air; if he is not
breathing, give artificial respiration, preferable mouth-to-mouth; if symptoms of cyanide poisoning are
observed, administer amyl nitrite as instructed for HCN. INGESTION: have victim drink water or
milk; do not induce vomiting; Toxicity by Inhalation (Threshold Limit Value): 0.5 ppm (suggested);
Short-Tern Exposure Limits: Data not available; Toxicity by Ingestion: Data not available; Late
Toxicity: Workers exposed to solutions may develop dermatitis; 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 Irritaat Characteristics: Severe skin irritant.