Page 348 - Handbook of Hazardous Chemical Properties

338 SELENIUM DIOXIDE

Vapor (Gas) Density: Not pertinent; Ratio of Specijic Heats of Vqor (Gas): Not pertinent, Lutd Heat
of Vaporization: Not pertinent; Heat of Combustion: -9.420, -5.230, -219; Heat Ofoecomposition: Not
pertinent.
Health Hazards Information - Recommended Personal Protective Equipment: Gloves: goggles:
respirator For dust: clean body-covering clothing; Symptoms Following Exposure: Inhalation of dust
irritates nose and throat. Vomiting may occur spontaneously if large amounts are swallowed. Contact
with eyes causes irritation, marked pain, and corneal injury which should heal. Prolonged or repeated
skin contact may cause marked irritation or even a mild burn; General Treatment for Exposure:
INHALATION: move to fresh air. INGESTION: induce vomiting and get medical attention promptly.
EYES: promptly flush with water for 15 min. and get medical attention. SKIN wash with soap and
water; Toxicity by Inhalation (ThreshoMLimit Value): Data not available; Short-Tern ExposureLim'ts:
Data not available; Toxicity by Ingestion: Grade 2, LD,, 0.5-5 glkg; Lace 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 pertinent; this is a combustible solid; Flammable Limits in Air (I):
Not pertinent; Fire Extinguishing Agents: Water, foam, dry chemical, or carbon dioxide; Fire
Extinguishing Agents Not To Be Used: Application of water or foam may cause frothing; gecial
Hazards of Combustion products: Irritating vapors of unburned product and phenol form during fires;
Behavior in Fire: This product sublimes and forms vapor or dust that can explode; Ignition Temperature
: No data; Electrical Hazard: Not pertinent; Burning Rate: Not pertinent.
Chemical Reactivity - Reactivity with Water: No reaction; Reactivity with Common Materials: No
reactions; Stability During Tmnsport: Stable; Neutralizing Agents forAcids and Caustics: Not pertinent;
Polymerization: Not pertinent; Inhibitor of Polymerization: Not pertinent.

SELENIUM DIOXIDE
Chemical Designations - Synonyms: Selenious anhydride; Selenium oxide; Chemical Fonnula: SeO,.
Observable Characteristics - Physical State (as normally shipped): Solid; Color: White; Odor:
Pungent; sour.
Physical and Chemical Properties - Physical State at 15 "c and I atm.: Solid; Molecular Weight:
111; Boiling Point at I am.: Not pertinent (decomposes); Freezing Point: Not pertinent; Critical
Tempemwe: Not pertinent; Critical Pressure: Not pertinent; SpecBc Gravity: 3.95 at 20 "C (solid);
Vapor (Gar) Density: Not pertinent; Ratio of Specijic Heats of Vapor (Gas) Not pertinent; Latent Heat
:
of Vaporization: Not pertinent; Heat of Combustion: Not pertinent; Heat of Decomposition: Not
pertinent.
Health Hazards Information - Recommended Personal Protective Equipment: Dust mask; rubber
gloves; protective clothing; Symptoms Following Exposure: Absorption of selenium may be
demonstrated by presence of the element in the urine and by a garlic-like odor of the breath, inhalation
of dust 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 causes irritation; General Treatmentfor Exposure:
Consult physician after all exposures or his compound. INHALATION remove victim to fresh air: give
oxygen if needed. INGESTION: induce vomiting; follow with gastric lavage and saline cathartics.
EYES: flush immediately and thoroughly with water. SKIN: flush with Water; Toxicity by Inhalation
(Threshold Limit Value): 0.2 mg/m3 (as selenium); Short-Tern Exposure Limits: 0.3 mg/m3, 30 min.
(as selenium); Taxicity by Ingestion: Data not available; Late Toxicity: Data not available; Vapor (Cis)
Irritm Characteristics: Data not available; Liquid or Solid Irritant chamcteristics: Data not available;
Odor Threshold: 0.0002 mg/m3.
Fire Hazards - Flash Point : Not flammable; Flammable Limits in Air (96): Not flammable; Fire
Extinguishing Agents: Not pertinent; Fire Extinguishing Agents Not To Be Used: Not pertinent; Special
Hmrak of Combustion Products: This product sublimes and forms toxic vapors when heated in fires;
Behavior in Fire: Not pertinent; Ignition Temperature : Not pertinent; Electrical Hazard: Not pertinent;
Burning Rate: Not pertinent.