Page 232 - Handbook of Hazardous Chemical Properties

222 ISOPRENE
Polymerization: Not pertinent; Inhibitor of Polymerization: Not pertinent.

ISOPRENE
Chemical Designations - Synonyms: beta-Methylbivinyl; 2-Methyl-l,3-butadiene; Chemical Formula:
CH,=C(CH,)CH=C%.
Observable Characteristics - Physical State (as shipped): Liquid; Color: Colorless; Odor: Mild,
aromatic.
Physical and Chemical Properties - Physical State at 15 “c and 1 am. : Liquid; Molecular Weight:
68.12; Boiling Point at I atm.: 93.4, 34.1, 301.3; Freezing Point: -230.1, -145.9, 121.3; Critical
Temperature: 412,211.1,484.3; Critical Pressure: 550,31.4, 3.19; Specific Gravity: 0.681 at 20 “C
(liquid); Vapor (Gas) Specijic Gravity: 2.3; Ratio of Specijic Heats ofvapor (Gas): 1.091; Latent Heat
of Vaporization: 150,85,3.6; Heat of Combustion: -18,848, -10,471,438.41); HeatofDecomposition:
Not pertinent.
Health Hazards Information - Recommended Personal Protective Equipment: Vapor-proof goggles;
self-contained breathing apparatus; leather or rubber safety shoes; rubber gloves; Symptoms Following
Exposure: Vapor produces no effects other than slight irritation of the eyes and upper respiratory tract.
Liquid may irritate eyes; like gasoline; General Treatment for Exposure: INHALATION: remove
victim promptly from irritating or asphyxiating atmosphere; if symptoms of asphyxiation persist,
administer artificial respiration and oxygen; treat symptomatically thereafter; call a physician. EYES:
flush with water for at least 15 min.; Toxicity by Inhalation (ThreshoMLimit Value): Data not available;
Short-Term Inhalation Limits: Data not available; Toxicity by Ingestion: Data not available; Late
Toxicity: None; Vapor (Gas) Irritant Characteristics: Vapors causes a slight smarting of the eyes or
respiratory system if present in high concentrations. The effect is temporary; Liquid or Solid Zm’fant
Characteristics: Minimum hazard. If spilled on clothing and allowed to remain, may cause smarting
and reddening of skin; Odor Threshold Data not available.
Fire Hazards - Flash Point (deg. F): -65 CC; Flammable Limits in Air ($6): 2 - 9; Fire Extinguishing
Agents: Dry chemical, foam, or carbon dioxide; Fire Extinguishing Agents Not To Be Used: Water may
be ineffective; Special Haards of Combustion Products: Toxic vapors are generated upon heating;
Behavior in Fire: May polymerize in containers and explode; Ignition Temperature (deg. F): 428;
Electrical Hazard: Class I, Group C; Burning Rate: 8.6 mmlmin.
Chemical Reactivity - Reactivity with Water: No reaction; Reactivity with Comn Materials: No
reactions; Stability During Tmport: Stable; Neutralizing Agents for Acids and Caustics: Not pertinent;
Polymerization: Polymerization is accelerated by heat and exposure to oxygen, as well as the presence
of contamination such as iron rust. Iron surfaces should be treated with an appropriate reducing agent
such as sodium nitrate, before being placed into isoprene service; Inhibitor of Polymerim’on: Tertiary
butyl catechol (0.06 $6). Di-n-butylamine, phenyl-beta-naphthylamine and phenyl-alpha-naphthylamine
are also recommended.
ISOPROPYL ACETATE
Chemical Designations - Synonyms: Acetic acid, isopropyl ester; 2-Propyl acetate; Chemical Formula:
CH,COOCH(CH,),.
Observable Characteristics - Physical State (as shipped): Liquid; Color: Colorless; Odor: Pleasant,
fruity; nonresidual .
Physical and Chemical Properties - Physical State at 15 “c and I atm. : Liquid; Molecular Weight:
102.13; Boiling Point at 1 atm.: 191.3, 88.5, 361.1; Freezing Point: -92.1, -69.3, 203.9; Critical
Temperature: 509, 265, 538; Critical Pressure: 529, 36, 3.65; Specific Gravity: 0.814 at 20 “C
(liquid); Vapor (Gas) Specific Gravity: 3.5; Ratio ofSpecijic Heats of Vapor (Gas): (est.) 1.074; bent
Heat of Vaporimtion: 150, 81, 3.4; Heat of Combustion: -9420, -5230, -219; Heat of Decomposition:
Not pertinent.
Health Hazards Information - Recommended Personal Protective Equipment: Organic vapor canister
or air-supplied mask; chemical goggles or face splash shield; Symptoms Following Exposure: Vapors
irritate eyes and respiratory tract; high concentrations can be anesthetic. Liquid irritates eyes but causes