Page 96 - Handbook of Hazardous Chemical Properties

86 CHROMIC ANHYDRIDE
CHROMIC ANHYDRIDE
Chemical Designations - Synonyms: Chromic Acid; Chromic Oxide; Chromium Trioxide; Chemical
Formula: CrO,.
Observable Characteristics - Physical State (as normally shipped): Solid; Color: Dark red; Odor:
None.
Physical and Chemical Properties - Physical State at I5 ‘C and I alrn. : Solid; Molecular Weight:
100.01; Boiling Point at I atm.: Not pertinent; Freezing Point: Not pertinent; Critical Temperature:
Not pertinent; Critical Pressure: Not pertinent; SpeciJic Gravity: 2.70 at 20°C (solid); Vapor (a)
Density: Not pertinent; 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: Goggles and respirator.
(Special chromic acid filters are available for respirators to prevent inhalation of dust or ‘mist);
Symptoms Following Exposure: Very irritating to eyes and respiratory tract. Ingestion causes severe
gastrointestinal symptoms. Contact with eyes or skin causes burns; prolonged contact produces
dermatitis (“chrome sores”); General Treatment for Exposure: INGESTION call a physician; do NOT
induce vomiting. SKIN OR EYES: wash eyes throughly for at least 15 min.; flush contacted skin areas
with water; remove contaminated clothing and wash before reuse; Toxicity by Inhalation (Threshold
Limit Value): Not pertinent; Shorl-Term ,!Caposure Limits: Not pertinent; Toxicity by Ingestion: Grade
3; LD,, 50 to 500 mg/kg; Late Toxicity: Lung cancer; Vapor (Gas) Irritant Characteristics: Not
pertinent; Liquid or Solid Irritm Characteristics: Severe skin irritant. Causes second- and third-degree
burns on short contact; very injurious to the eyes; Odor Threshold Not pertinent.
Fire Hazards - Flash Point: Not flammable; Flmnmble Limits in Air (%): Not flammable; Fire
Extinguishing Agents: Water; Fire Extinguishing Agents Not To Be Used: Not pertinent; Special
Hazards of Combustion Products: Not pertinent; Behavior in Fire: Containers may explode. Water
should be applied to cool container surfaces exposed to adjacent fires; Ignition Temperature: This
product may ignite organic materials on contact; Electrical Hazard: Not pertinent; Burning Rate: Not
flammable.
Chemical Reactivity - Reactivity with Water: No reaction; Reactivity with Common Materials: Reacts
with organic materials rapidly, generating sufficient heat to cause ignition. Prolonged contact on wood
floors can result in a fire hazard; Stability During Transport: Stable; Neutralizing Agents for Acids and
Caustics: Flood with water and rinse with sodium bicarbonate solution; Polymerization: Not pertinent;
Inhibitor of Polymerization: Not pertinent.

CHROMYL CHLORIDE
Chemical Designations - Synonyms: Chromium (VI) Dioxychloride; Chromium Oxychloride; Chemical
Formula: CrO,Cl,
Observable Characteristics - Physical State (as normally shipped): Liquid; Color: Dark red; Odor:
Acrid.
Physical and Chemical Properties - Physical State at 15 ‘C and I atm. : Liquid; Molecular Weight:
154.9; Boiling Point at I atm.: 241, 116, 389; Freezing Point: -141.7, -96.5, 176.7; Critical
Temperature: Not pertinent; Critical Pressure: Not pertinent; specific Gravity: 1.96 at 20°C (liquid);
Vapor (Gas) Density: 5.3; Ratio of Specific Heats of Vapor (Gas): 1.2832; Latent Heat qf Vaporizalion:
113, 62.6, 2.62; Heat of Combustion: Not pertinent; Heat of Decomposition: Not pertinent.
Health Hazards Information - Recommended Personal Protective Equipment: SCBA (full face);
rubber gloves; protective clothing; Symptoms Following Exposure: Inhalation causes severe irritation
of upper respiratory system. Contact with eyes or skin causes irritation and burning. Ingestion causes
burning of mouth and stomach; General Treatment for Exposure: Get medical attention following all
exposures to this compound. INHALATION remove from exposure; support respiration. EYES: flush
with copious quantities of water for 15 min. SKIN: flush with water for 15 min. INGESTION: do NOT
induce vomiting; give large amounts of water; Toxicity by Inhalation (Threshold Limit Value): Data not
available; Short-Term Exposure Limits: Data not available; Toxicity by Ingestion: Grade 4; LD,, < 50
mg/kg; Late Toxicity: Data not available; Vapor (Gas) Irritant Characteristics: Vapors cause severe