Page 273 - Handbook of Hazardous Chemical Properties

METHYL ISOPROPENYL KETONE, INHIBITED 263

Temperature: 568.9, 298.3, 511.5; Critical Pressure: 415, 32.3, 3.27; Specific Gravity: 0.802 at 20
"C (liquid); Vapor (Gas) Specific Gmvity: Not pertinent; Ratio of Specific Heats of Vapor (Gas):
1.061; Latent Heat of Vaporization: 149,82.5,3.45; Heat of Combustion: (est.) -10,400, -5,800, -242;
Heat of Decomposition: Not pertinent.
Health Hazards Information - Recommended Personal Protective Equipment: Air pack or organic
canister mask; rubber gloves; goggles or face shield; Symptoms Following Exposure: Vapor irritates
eyes and nose; high concentrations can cause anesthesia and depression. Liquid dries out skin and may
cause dermatitis; generally irritates eyes but does not injure them; General Treatment for Exposure:
INHALATION: remove victim to fresh air and give artificial respiration if needed; seek medical
attention immediately. SKIN OR EYES: flush eyes thoroughly with water; wash skin with water until
irritation stops; Toxicity by Inhalation (Threshold Limit Value) : 100 ppm; Short-Tern Inhalation Limits:
100 ppm for 60 min.; Toxicity by Ingestion: Grade 2, LD,, 0.5 to 5 g/kg (rat); Late Toxicity: None;
Vapor (Gas) Zm'tant Characteristics: Vapors cause moderate irritation such that personnel will find
high concentrations unpleasant. The effect is temporary; Liquid or Solid Irritant Characteristics:
Minimum hazard. If spilled on clothing and allowed to remain, may cause smarting and reddening of
skin; Odor Threshold: 0.47 ppm.
Fire Hazards - Flash Point (deg. F): 73 CC; 75 OC; Flammable Limits in Air (W): 1.4 - 7.5; Fire
Extinguishing Agents: Alcohol foam, dry chemical, or carbon dioxide; Fire Extinguishing Agents Not
To Be Used: Water may be ineffective; Special Hazards of Combustion Products: Irritating vapors are
generated when heated; Behavior in Fire: Vapors may travel a considerable distance and ignite, causing
a flash back; Ignition Temperature (deg. F): 854; Electrical Hazard: Class I, Group D; Burning Rate:
Data not available.
Chemical Reactivity - Reactivity with Water: No reaction; Reactivity with Comn Materials: No
reaction; Stability During Transport: Stable; Neutralizing Agents for Acids and Caustics: Not pertinent;
Polymerization: Not pertinent; Inhibitor of Polymerization: Not pertinent.

METHYL ISOPROPENYL I(ETONE, INHIBITED
Chemical Designations - Synonyms: Isopropenyl methyl ketone; 2-Methyl- 1-butene-3-one; Chemical
Formula: CH,COC(CHJ =CH,.
Observable Characteristics - Physical State (as shipped): Liquid; Color: Colorless; Odor: Very
pungent; pleasant; sweet.
Physical and Chemical Properties - Physical State at 15 "c and I atm. : Liquid; Molecular Weight:
84.1; Boiling Point at 1 atm.: 208, 98, 371; Freezing Point: -65, -54,219; Critical Temperamre: Not
pertinent; Critical Pressure: Not pertinent; Spec@c Gmvity: 0.85 at 20 "C (liquid); Vapor (Gas)
Specific Gravity: 2.9; Ratio ofspecific Heats of Vapor (Gas): 1.0796 at 20 "C (68°F); Latent Heat of
Vaporization: (est.) 182, 101, 4.23; Heat of Combustion: (est.) -15,500, -8,600, -360; Heat of
Decomposition: Not pertinent.
Health Hazards Information -Recommended Personal Protective Equipment: Goggles or face shield;
rubber gloves; Symptoms Following Exposure: Inhalation causes irritation of nose and throat. Liquid
may cause severe damage to eyes, resulting possibly in some permanent impairment of vision; vapor
produces tears. If not removed promptly from skin, liquid may cause delayed pain and blistering.
Ingestion causes irritation of mouth and stomach; General Treatment for Exposure: INHALATION:
remove victim from exposure; give artificial respiration if needed; call physician. EYES: immediately
irrigate with copious amounts of water for 15 min.; call physician if burn has occurred. INGESTION:
induce vomiting; call physician; Toxicity by Inhalation (Threshold Limit Value): Data not available;
Short-Term Inhalation Limits: Data not available; Toxicity by Ingestion: Grade 3; oral LD,, = 180
mg/kg (rat); Late Toxicity: Data not available; Vapor (Gas) Irritant Characteristics: Vapors are
moderately irritating such that personnel will not usually tolerate moderate or high concentrations;
Liquid or Solid Im'tm Characteristics: Causes smarting of the skin and first-degree burns on short
exposure; may cause secondary burns on long exposure; Odor l7zreshold Data not available.
Fire Hazards - Flash Point (deg. F): < 73 CC; Flammable Limits in Air (W): 1.8 - 9.0; Fire
Extinguishing Agents: Dry chemical, foam, carbon dioxide; Fire Extinguishing Agents Not To Be Used: