Page 149 - Handbook of Hazardous Chemical Properties

DIMETHYL TEREPHTHALATE 139
Chemical Reactivity - Reactivity with Water : No reaction; Reactivity with Common Materials: No
reaction; Stability During Transport: Stable; Neutralizing Agents for Acids and Causticst Not pertinent;
Polymerization: Not pertinent; Inhibitor of Polymerization: Not pertinent.

DIMETHYJ., SULFOXIDE
Chemical Designations - Synonyms: DMSO; Methyl Sulfoxide; Chemical Formula: CH3SOCH3.
Observable Characteristics - Physical State (as normally shipped) : Liquid; Color: Colorless; Odor:
Slight; almost odorless.
Physical and Chemical Properties - Physical State at 15 ‘C and 1 m. : Liquid; Molecular Weight:
18.13; Boiling Point at 1 atm.: 312, 189, 462; Freezing Point: 65.5, 18.6, 291.8; Critical
Temperature: Not pertinent; Critical Pressure: Not pertinent; Specific Gravity: 1.101 at 20°C (liquid);
Vapor (Gas) Density: Not pertinent; Ratio of Specific Heats of Vapor (Gas): Not pertinent; Latent Heat
of Vaporization: 259,144,6.03; Heat of Combustion: -10,890, -6,050, -253.3; Heat ofDecornposition:
Not pertinent.
Health Hazards Information - Recommended Personal Protective Equipment: Butyl rubber gloves,
safety goggles. Respiratory filter if airborne sprays or drops are present; Symptoms Following
Exposure: Slight eye irritation; General Treatment for Exposure: Wash eyes and skin with water;
Toxicity by Inhalation (Threshold Limit Value): Data not available; Short-Term Exposure Limits: Data
not available; Toxicity by Ingestion: Grade 0; above 15 glkg; Late Toxicity: Causes damage to eye in
dogs, pigs, rats, and rabbits; Vapor (Gas) Irritant 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 the skin; Odor Threshold Data not available.
Fire Hazards - Flash Point (deg. F): 203 OC; Flammable Limits in Air (%): 3 - 6.3; Fire
Extinguishing Agents: Water, foam, dry chemical, or carbon dioxide; Fire Extinguishing Agents Not
to be Used: Not pertinent; Special Hazards of Combustion Products: Sulfur dioxide, formaldehyde, and
methyl mercaptan may form; Behavior in Fire: Not pertinent; Ignition Temperature (deg. F): 572;
Electrical Hazard: Not pertinent; Burning Rate: 2.0 mmlmin.
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;
Polymerizaion: Not pertinent; Inhibitor of Polymerization: Not pertinent.

DIMETHYL TEREPHTHALATE
Chemical Designations - Synonyms: Terephthalic Acid, Dimethyl Ester; Chemical Fonnula: 1,4-
CH,00CC,H,COOCH3.
Observable Characteristics - Physical State (as normally shipped): Solid or liquid; Color: Colorless;
Odor: None; weak aromatic.
Physical and Chemical Properties - Physical State at 15 ‘C and 1 arm. : Solid; Molecular Weight:
194.2; Boiling Point at 1 atm.: 540, 282, 555; Freezing Point: 284, 140, 413; Critical Temperature:
Not pertinent; Critical Pressure: Not pertinent; Specific Gravity: 1.2 at 20°C (solid); Vapor (Gas)
Density: Not pertinent; Ratio of Specific Heats of Vapor (Gus): Not pertinent; Latent Heat of
Vaporization: 121,61.2,2.81; Heat of Combustion: -10,310, -5,727, -239,6; Heat of Decomposition:
Not pertinent.
Health Hazards Information - Recommended Personal Protective Equipment: Molten DMT: goggles,
face shield, gauntlets, and protective clothing. Solid: dust mask, goggles; Symptoms Following
Exposure: Molten DMT will cause severe burns on skin on contact; General Treatment for Exposure:
EYES: flush dust from eyes with water. SKIN: wash with soap and water. If burned by molten DMT,
flush area immediately with cold water for at least 15 min.; apply ice pack for at least 30 min.; do not
try to rub DMT off a burn or remove clothing that DMT has penetrated, because this will remove
underlying skin; seek prompt medical treatment for significant burns; Toxicity by Inhalation (Threshold
Limit Value): Data not available; Short-Tern Exposure Limits: Not pertinent; Toxicity by Ingestion:
Grade 2; oral LD,, 4,390 mglkg (rat); Late Toxicity: Data not available; Vapor (Gus) Irritant