Page 258 - Handbook of Hazardous Chemical Properties

248 METHANE
goggles; rubber gloves; Symptoms Following Eqosure: Inhalation causes irritation of nose and throat.
Contact with vapor or liquid causes irritates eyes. Liquid irritates skin. Ingestion causes irritation of
mouth and stomach; General Treamrentfor Exposure: INHALATION: remove victim to fresh air; give
oxygen if breathmg stops; give artificial respiration and oxygen; subsequent treatment is symptomatic
and supportive. EYES: flush with water for at least 15 min.; get medical attention if exposure has been
to liquid. SKIN: flush with water; get medical attention if skin is burned. INGESTION: induce
vomiting and follow with gastric lavage, demulcents, and saline cathartics; get medical attention;
Toxicity by Inhalation (Threshold Limit Value) : Data not available; Short-Term Inhahiion Limits: Data
not available; Toxicity by Ingestion: Data not available; Late Toxicity: Data not available; Vapor (Gas)
Irritm Characteristics: Data not available; Liquid or Solid Irritant characteristics: Data not available;
Odor l3reshold Data not available.
Fire Hazards - Flash Point (&g. F): 14 OC; Flammable Limits in Air (W): 2.3 - 9.3; Fire
Extinguishing Agents: Alcohol foam, dry chemical, carbon dioxide; Fire Extinguishing Agents Not To
Be Used: Water may be ineffective; Special Hazards of Combustion Products: Irritating and toxic
hydrogen chloride and phosgene vapors may be formed; Behavior in Fire: Vapor is heavier than air and
may travel a considerable distance to a source of ignition and flash back; Ignition Temperature : Data
not available; Electrical Hazard: Data not available; Burning Rate: 4.4 mm/min.
Chemical Reactivity - Reactivity with Water: No reaction; Reactivity with Common Materials: No
reaction; Stability During Transport: Stable; Neutralizing Agents for Acidr and Caustics: Not pertinent;
Polymerization: Not pertinent; Inhibitor of Polymerimion: Not pertinent.

METHANE
Chemical Designations - Synonyms: Marsh gas; Chemical Formula: CH,,
Observable Characteristics - Physical State (as shipped): Liquefied gas; Color: Colorless; Odor:
Mild; sweet.
Physical and Chemical Properties - Physical State at 15 C and 1 atm.: Gas; Molecular Weight:
16.04; Boiling Point at 1 atm.: -258.7, -161.5, 111.7; Freezing Point: -296.5, -182.5, 90.7; Critical
Temperature: -116.5, -82.5, 190.7; Critical Pressure: 668, 45.44, 4.60; Specijic Gravity: 0.422 at
=160 "C (liquid); Vapor (Gas) Specific Gravity: 0.55 1.0; Ratio of Specijic Heats of Vapor (Gas):
-
1.306; Lutent Heat of Vaporization: 219.4, 121.9, 5.100; Heat of Combustion: -21,517, -11,954,
500.2; Heat ofDecomposition: Not pertinent.
Health Hazards Information - Recommended Personal Protective Equipment: Self-contained breathing
apparatus for high concentrations; protective clothing if exposed to liquid; Symptoms Following
Exposure: High concentrations may cause asphyxiation. No systemic effects, even at 5% concentration
in air; General Treatment for Exposure: Remove to fresh air. Support respiration; Toxicity by
Inhalation (Threshold Limit Value): Not pertinent(methane is an asphyxiant, and limiting factor is
available oxygen); Short-Term Inhalation Limits: Data not available; Toxicity by Ingestion: Not
pertinent; Lute Toxicity: None; Vapor (Gas) Irritant Characteristics: Vapors are nonirritating to the
eyes and throat; Liquid or Solid Irritant Characteristics: No appreciable hazard. Practically harmless
to the skin because it is very volatile and evaporates quickly, but may cause some frostbite; Odor
l3reshold: 200 ppm.
Fire Hazards - Flash Point : Flammable gas; ~ammable Limits in Air (W): 5.0 - 15.0; Fire
Extinguishing Agents: Stop flow of gas; Fire Extinguishing Agents Not To Be Used: Water; gecial
Hazards of Combustion Products: None; Behavior in Fire: Not pertinent; Ignition Temperature (deg.
F): 1004; Electrical Hazard: Class I, Group D; Burning Rate: 12.5 dmin.
Chemical Reactivity - Reactivity with Water: No reaction; Reactivity with Common Materials: No
reaction; Stability During Tmport: Stable; Neutralizing Agents for Acids and Caustics: Not pertinent;
Polyme&m.on: Not pertinent; Inhibitor of Polymerizaz?on: Not pertinent.

METHOXYCHLOR
Chemical Designations - @nonyms: 2,2-Bis(p-methoxyphenyl)-l, 1,l-trichloroethane; 2,2-Di-(p-
anisy1)-l,l, 1- trichloroethane; DMDT; Marlate 50; Methoxy-DDT; Chemical Formula: C,6H,,C1,02.