Page 274 - Handbook of Hazardous Chemical Properties

264 METHYLMERCAFTAN
Water may be ineffective; Special Hazards of Combustion Products: Not pertinent; Behavior in Fire:
May polymerize and explode; Ignition Temperature : Data not available; Electrical Hazard: Data not
available; Burning Rate: 4.7 mm/min.
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: Will polymerize in the absence of inhibitor, especially when heated; Inhibitor of
Polymerization: Up to 1 % hydroquinone.

METELYL MERCAPTAN
Chemical Designations - Symnyms: Mercaptomethane; Methanethiol; Methyl sulfidrate; Thiomethyl
alcohol; Chemical Formula: CH,SH.
Observable Characteristics -Physical State (as shipped) : Liquefied compressed gas; Color: Colorless;
Odor: Garlic; foul; &ong offensive.
Physical and Chemical Properties - Physical State at 15 rand 1 am. : Gas; Molecular Weight: 48.1 ;
Boiling Point at I atm.: 43.2, 6.2, 279.4; Freezing Point: -189, -123, 150; Critical Temperature:
386.2, 196.8, 470.0; Critical Pressure: 1,050, 71.4, 7.25; Specific Gravity: 0.892 at 6 "C (liquid);
Vapor (Gas) Specific Gravity: 1.66; Ratio of specific Heats of Vapor (Gas): 1.1988; Latent Heat of
Vaporization: 220, 122, 5.10; Heat of Combustion: -1 1,054, -6,141, -257.0; Heat of Decomposition:
Not pertinent.
Health Hazards Information -Recommended Personal Protective Equipment: Self-contained breathing
apparatus or air-line mask; goggles or face shield; rubber gloves; Symptoms Following Exposure:
Inhalation causes irritation of respiratory system, tremors, paralysis, unconsciousness; death may
follow respiratory paralysis. Contact with liquid irritates eyes and skin. Ingestion causes irritation of
mouth and stomach plus symptoms described for inhalation; General Treannent for Exposure:
INHALATION: remove patient immediately from the contaminated area; keep him warm and at
complete rest; if necessary give artificial respiration until medical assistance can be obtained; oxygen
or oxygen-C02 inhalation is recommended, continuing after spontaneous breathing has returned. EYES:
for exposure to vapor, apply hot and cold compresses to reduce pain of conjunctivitis; for exposure to
liquid, wash with water and obtain medical assistance. SKIN: wash with water. INGESTION induce
vomiting and follow with gastric lavage; Toxicity by Inhalation (Threshold Limit Value): 0.5 ppm;
Short-Term Inhalation Limits: 20 ppm for 5 min.; Toxicity by Ingestion: Data not available; Lute
Toxicity: Data not available; Vapor (Gas) Irritant Characteristics: Data not available; Liquid or Solid
Irritant Characteristics: Data not available; Odor Threshold: 0.0021 ppm.
Fire Hazards - Flash Point : Not pertinent (flammable, liquefied compressed gas); Flammable Limits
in Air (%): 3.9 - 21.8; Fire Extinguishing Agents: Preferably let fire burn, stop gas flow. Fires may
be extinguished with dry chemical, foam, or carbon dioxide; Fire Extinguishing Agents Not To Be
Used: Water may be ineffective; special Hazards of Combustion Products: Irritating sulfur dioxide is
produced; Behavior in Fire: Containers may explode; Ignition Temperature : Data not available;
Electrical Hazard: Data not available; Burning Rate: 3.8 mdmin.
Chemical Reactivity - Reactivity with Water: No reaction; Reactivity with Common Materials: No
reaction; Stability During Transport: Stable; Neutralizing Agents for Aciak and Caustics: Not pertinent;
Polymerization: Not pertinent; Inhibitor of Polymerization: Not pertinent.

METHYL METHACRYLATE
Chemical Designations - Synonyms: Methacrylate monomer; Methacrylic acid, methyl ester; Methyl
alpha-methylacrylate; Methyl 2-methyl-2-propenoate; Chemical Formula: CH, = C(CH,)COOCH,,
Observable Characteristics - Physical State (as shipped): Liquid; Color: Colorless; Odor: Sharp,
fragrant; pleasant smelling; pungent ester.
Physical and Chemical Properties - Physical State at 15 "c and 1 a&z. : Liquid; Molecular Weight:
100.12; Boiling Point at I atm.: 214, 101, 374; Freezing Point: -54, 48, 225; Critical Temperature:
561,294,567; Critical Pressure: 485, 33, 3.3; Specific Gravity: 0.945 at 20 "C (liquid); Vapor (Gas)
Specific Gravity: Not pertinent; Ratio of Specific Heats of Vapor (Gas): 1.059; Latent Heat of