Page 111 - Handbook of Hazardous Chemical Properties

P-CUMENE 101

CYCLOPENTANE
Chemical Designations - Synonyms: Pentamethylene; Chemical Formula: C,H,,.
Observable Characteristics - Physical State (as nonnally shipped) : Liquid; Color: Colorless; Odor:
Like gasoline; mild, sweet.
Physical and Chemical Properties - Physical State at 15 “c and I atm. : Liquid; Molecular Weight:
70.1; Boiling Point at I atm.: 120.7, 49.3, 322.5; Freezing Point: -137.0, -93.9, -179.3; Critical
Temperature: 461.5,238.6, 511.8; Critical Pressure: 654,44.4,4.51; Specific Gravity: 0.74 at 20°C
(liquid); Vapor (Gas) Density: 2.4; Ratio of Spec@c Heats of Vapor (Gas): 1.1217; Latent Heat of
Vaporization: 179,94,3.9; Heat of Combustion: -19,990, -11,110, -465; Heat ofDecomposition: Not
pertinent.
Health Hazards Information - Recommended Personal Protective Equipment: Hydrobarbon canister,
supplied air, or hose mask; rubber or plastic gloves; chemical goggles or face shield; Symptom
Following Exposure: Inhalation causes dizziness, nausea, and vomiting; concentrated vapor may cause
unconsciousness and collapse. Vapor causes slight smarting of eyes. Contact with liquid causes
irritation of eyes and may irritate skin if allowed to remain. Ingestion causes irritation of stomach.
Aspiration produces severe lung irritation and rapidly developing pulmonary edema; central nervous
excitement followed by depression; General Treatment for Exposure: INHALATION: remove to fresh
air; if breathing stops, apply artificial respiration and administer oxygen. EYES: flush with water for
at least 15 min.; call a physician. SKIN: flush well with water, then wash with soap and water.
INGESTION: do NOT induce vomiting; guard against aspiration into lungs. ASPIRATION: enforce
bed rest; give oxygen; get medical attention; Toxicity by Inhalation (Threshold Limit Value): Data not
available; Short-Term Eaposure Limits: 300 ppm for 60 min.; Toxicity by Ingestion: Grade 2; LD,, 0.5
to 5 glkg; Late Toxicity: None; Vapor (Gas) Irritant Characteristics: Vapors cause slight smarting of
the eyes or respiratory system if present in high concentrations. 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 the skin; Odor Threshold. Data not available.
Fire Hazards -Flash Point (deg. F): < 20 CC; Flammable Limits in Air (96): (approx.) 1.1 - 8.7; Fire
Extinguishingrlgents: Dry chemical, foam, carbon dioxide; Fire Extinguishing Agents Not To Be Used
Water may be ineffective; Special Hazards of Combustion Products: Not pertinent; Behavior in Fire:
Containers may explode; Ignition Temperature (deg. F): 716; Electrical Hazard: Not pertinent; Burning
Rate: 7.9 mmlmin.
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.

P-CUMENE
Chemical Designations - Synonym: Cymol; p-Isopropyltoluene; Isopropyltoluol 1-Methyl4Isopropyl-
benzene; Methyl Propyl Benzene; Chemical Formula: p-CH,C,H.,CH(CH,),.
Observable Characteristics - Physical State (as nonnally shipped) : Liquid; Color: Colorless; Odor:
Mild, pleasant; aromatic, solvent-type.
Physical and Chemical Properties - Physical State at 15 “c and I atm. : Liquid; Molecular Weight:
134.2; Boiling Point at I atm.: 351, 177, 450; Freezing Point: -90.2, -67.9, 205.3; Critical
Temperature: Not pertinent; Critical Pressure: Not pertinent; Spec@c Gravity: 0.857 at 20°C (liquid);
Vapor (Gas) Density: Not pertinent; Ratio of Specijic Heats of Vapor (Gas): Not pertinent; Latent Heat
of Vaporization: 122,67.8,2.84; Heat @Combustion: -18,800, -10,400, -437; Heat ofDecomposition:
Not pertinent.
Health Hazards Information - Recommended Personal Protective Equipment: Self-contained or air-
line breathing apparatus; solvent-resistant rubber gloves; chemical splash goggles; Symptoms Following
Exposure: Inhalation causes impairment of coordination, headache. Contact with liquid causes mild
irritation of eyes and skin. Ingestion causes irritation of mouth and stomach; General Treatment for
Exposure: INHALATION: remove victim from contaminated area; administer artificial respiration if
necessary; call physician. SKIN: wipe off liquid; wash well with soap and water. INGESTION: induce