Page 277 - Handbook of Hazardous Chemical Properties

ALPHA-METHYLSTYRENE 267

Health Hazards Information -Recommended Personal Protective Equipment: Goggles or face shield;
rubber gloves; Symptoms Following Exposure: Inhalation of hot vapors can irritate nose and throat.
Ingestion causes irritation of mouth and stomach. Contact with eyes causes irritation. Repeated and
prolonged skin contact produces a mild, transient irritation; General Treatment for Exposure:
INHALATION: remove to fresh air. INGESTION: give large amounts of water and induce vomiting.
EYES: flush with water for at least 15 min. SKIN: remove from skin and eyes by flooding the affected
tissues with water; wash with soap and water; Toxicity by Inhalation (ThresholdLimit Value): Data not
available; Short-Term Inhalation Limits: Data not available; Toxicity by Ingestion: Grade 2; oral LD,,
= 3.5 mglkg (rabbit); Late Toxicity: Causes blood abnormalities in rats; Vapor (Gas) ZmYant
Characteristics: Data not available; Liquid or Solid Im'tant Characteristics: Data not available; Odor
Threshold: Data not available.
Fire Hazards - Flash Point (deg. F): 204 OC; Flammable Limits in Air (96): Data not available; Fire
Extinguishing Agents: Dry chemical, "alcohol foam", or carbon dioxide; Fire Extinguishing Agents Not
To Be Used: Water may be ineffective; Special Hazards of Combustion Products: Toxic oxides of
nitrogen may be formed in tire; Behavior in Fire: Data not available; Ignition Temperature : Data not
available; Electrical Hazard: Data not available; Burning Rate: Data not available.
Chemical Reactivity - Reactivity with Water: No reaction; Reactivity with Common Materials: No
reaction; Stability During, Transport: Stable; Neutralizing Agents for Acids and Caustics: Not pertinent;
Polymerization: Not pertinent; Inhibitor of Polymerization: Not pertinent.
ALPHA-METHYLSTYRENE
Chemical Designations - Synonyms: Isopropenylbenzene; 1-Methyl-1-phenylethylene;
Phenylpropylene; Chemical Formula: C,&C(CH,) = CH,.
Observable Characteristics - Physical State (as shipped): Liquid; Color: Colorless; Odor:
Characteristic.
Physical and Chemical Properties - Physical State at 15 "c and 1 am. : Liquid; Molecular Weight:
118.17; Boiling Point at I atm.: 329, 165, 438; Freezing Point: -9.8, -23.2, 250.0; Critical
Temperature: 719.1,381.7,654.9; Critical Pressure: 494, 33.6,3.41; Specific Gravity: 0.91 at20 "C
(liquid); Vapor (Gas) Specific Gravity: 4.08; Ratio of Specific Heats of Vapor (Gas): 1.060 at 27 "C;
Latent Heat of Vaporization: 140.4, 78.0, 3.26; Heat of Combustion: -17,690, -9,830, -411; Heat of
Decomposition: Not pertinent.
Health Hazards Information - Recommended Personal Protective Equipment: Neoprene gloves;
splashproof goggles or face shield; Symptoms Following Exposure: Inhalation causes irritation of
respiratory tract, headache, dizziness, light-heatedness, and breathlessness. Ingestion causes irritation
of mouth and stomach. Contact with liquid irritates eyes. Prolonged skin contact can cause severe
rashes, swelling, and blistering; General Treatment for Exposure: INHALATION: remove victim to
fresh air; if he is not breathiig, give artificial respiration; contact a physician; keep victim quiet and
warm. INGESTION: do NOT induce vomiting; call a physician. EYES: flush with water for at least
15 min. ; get medical attention. SKIN wash area with soap and water; Toxicity by Inhalation (Threshold
Limit Value): 100 ppm; Short-Term Inhalation Limits: 100 ppm, 30 min.; Toxicity by Ingestion: Grade
2, LD, 0.5-5 glkg; Late Toxicity: Data not available; Vapor (Gas) Irritant Characteristics: Data not
available; Liquid or Solid Im'tant Characteristics: Data not available; Odor Threshold C 10 ppm.
Fire Hazards - Flash Point (deg. F): 137 CC; .Flammable Limits in Air (76): 1.9 - 6.1; Fire
Extinguishing Agents: Dry chemical, foam, carbon dioxide; Fire Extinguishing Agents Not To Be Used:
Water may be ineffective; Special Hazards of Combustion Products: Data not available; Behavior in
Fire: Data not available; Ignition Temperature (deg. F): 1,066; Electrical Hazard: Data not available;
Burning Rate: Data not available.
Chemical Reactivity - Reactivity with Water: No reaction; Reactivity with Comn Materials: May
attack some forms of plastics; Stability During Transport: Stable; Neutralizing Agents for Acids and
Caustics: Not pertinent; Polymerization: Hazardous polymerization unlikely to occur except when in
contact with alkali metals or metallo-organic compounds; Inhibitor of Polymerization: 10 -20 ppm tert-
butylcatechol.