Page 349 - Handbook of Hazardous Chemical Properties

SILICON TETRACHLORIDE 339

Chemical Reactivity - Reactivity with Water: No reaction; Reactivity with Comn Materials: In
presence of water will corrode most metals; Stability During Transport: Stable; Nartralizing Agents
for Acids and Causrics: Not pertinent; Polymerization: Not pertinent; Inhibitor of Polymerization: Not
pertinent.

SELENIUM TRIOXIDE
Chemical Designations - Synonyms: Selenic anhydride; Chemical Formula: SeO,.
Observable Characteristics - Physical State (as normally shipped): Solid; Color: White; Odor: Data
not available.
Physical and Chemical Properties - Physical State at 15 'C and I atm.: Solid; Molecular Weight:
126.9; Boiling Point at I atm.: Not pertinent (decomposes); Freezing Point: 244, 118, 391; Critical
Temperature: Not pertinent; Critical Pressure: Not pertinent; Specific Gravity: 3.6 at 20 "C (solid);
Vapor (Gas) Density: Not pertinent; Ratio of Specific Hems 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: Dust mask goggles or
Face shield: rubber gloves; Symptoms Following Exposure: Absorption of selenium may be
demonstrated by presence of the element in the urine and by a garlic-like odor of breath, inhalation can
cause bronchial spasms symptoms of asphyxiation, and pneumonitis. Acute symptoms of ingestion
include sternal pain, cough, nausea, pallor, coated tongue, gastrointestinal disorders, nervousness and
conjunctivitis. Contact with eyes or skin causes irritation; General Trearment for Exposure:
INHALATION: remove victim to fresh air; give oxygen if necessary. INGESTION: induce vomiting:
follow with gastric lavage and saline cathartics. EYES: flush with water; Toxicity by Inhalation
FresholdLimit Value): 0.2 mg/m3, (as selenium); Short-Term Exposure Limits: 0.3 mg/m3, 30 min.
(as selenium); Toxicity by Ingestion: Data not available; Late Toxicity: Data not available; Vapor (Gas)
Irritant Characteristics: Data not available; Liquid or Solid Irritant Characteristics: Data not available;
Odor Threshold: Data not available.
Fire Hazards - Flash Point : Not flammable; Flammable Limits in Air (96): Not flammable; Fire
Ektinguishing Agents: Not pertinent; Fire Extinguishing Agents Not To Be Used: Not pertinent; Special
Hazards of Combustion Products: Not pertinent; Behavior in Fire: Not pertinent; Ignition Temperature
: Not pertinent; Electrical Hazard: Not pertinent; Burning Rate: Not pertinent.
Chemical Reactivity - Reactivity with Water: Reacts vigorously with water forming selenic acid
solution; Reactivity with Comn Materials: Corrodes all metals in the presence of water; Stability
During Tmnrport: Stable; Neutralizing Agentsfor Acids and Caustics: Flush with water and rinse with
dilute solution of sodium bicarbonate or soda ash; Polymerization: Not pertinent; Inhibitor of
Polymerizm*on: Not pertinent.

SILICON TETRACHLORIDE
Chemical Designations - Synonyms: Silicon chloride; Chemical Formula: SiCl,.
Observable Characteristics - Physical State (as normally shipped): Liquid; Color: Colorless to pale
yellow; Odor: Suffocating.
Physical and Chemical Properties - Physical State at 15 "c and I atm. :Liquid; Molecular Weight:
169.9; Boiling Point at 1 atm.: 135.1, 51.6, 330.8; Freezing Point: -94, -70, 203; Critical
Temperwe: 472.5,233.6,506.8; Critical Pressure: 542,36.8,3.14; Specific Gravity: 1.48 at 20 "C
(liquid); Vapor (Gus) Density: 5.86; Ratio of SpeciJic Heats of Vapor (Gas): Data not available; Latent
Heat of Vaporizm'on: 14.2, 41.2, 1.13; Heat of Combustion: Not pertinent; Heat of Decomposition:
Not pertinent.
Health Hazards Information -Recommended Personal Protective Equipment: Add-canister-type gas
mask or self-contained breathing apparatus; goggles or face shield, rubber gloves, other protective
clothing to prevent contact with skin, Symptoms Following Exposure: Inhalation causes severe irritation
of upper respiratory tract resulting in coughing, choking, and a feeling of suffocation; continued
inhalation may produce ulceration of the nose, throat, and larynx; if inhaled deeply, edema of the lungs