Page 252 - Handbook of Hazardous Chemical Properties

242 MALEIC ACID
MALEIC ACID
Chemical Designations -Synonyms: cis-Butenedioic acid; cis-l,2-Ethylenedicarboxylic acid; Maleinic
acid; Malenic acid; Toxilic acid; Chemical Fonnula: HOOC-CH=CH-COOH.
Observable characteristics - Physical State (as shipped): Solid; Color: White; Odor: None.
Physical and Chemical Properties - Physical State at 15 'C and I atm. : Solid; Molecular Weight:
116.1; Boiling Point at I atm. : Not pertinent (decomposes); Freezing Point: Not pertinent; Critical
Temperature: Not pertinent; Critical Pressure: Not pertinent; Specific Gravity: 1.59 at 20°C (solid);
Vapor (Gas) Specific Gravity: Not pertinent; Ratio of Specific Heats of Vapor (Gas): Not pertinent;
Latent Heat of Vaporization: Not pertinent; Heat of Combustion: -5,O00, -2,800, -117; Heat of
Decomposition: Not pertinent.
Health Hazards Information - Recommended Personal Protective Equipment: Dust mask; goggles or
face shield; protective gloves; Symptoms Following Exposure: Inhalation causes irritation of nose and
throat. Contact with eyes or skin causes irritation; General Treatment for jEnPosure: INHALATION:
remove to fresh air. EYES: immediately flush with plenty of water for at least 15 min.; get medical
attention if irritation persist. SKIN: wash with soap and water; Toxicity by Inhalation (ThreshoMLimit
Value): Data not available; Short-Tern Inhalation Limits: Data not available; Toxicity by Ingestion:
Grade 2; oral LD, = 708 mg/kg (rat); Late Toxicity: Data not available; Vapor (Gas) Irritanf
Characteristics: Data not available; Liquid or Solid Im*tant Characteristics: Data not available; Odor
Zhreshold: Data not available.
Fire Hazards - Flash Point : Not pertinent (combustible solid); Flammable Limits in Air (5%): Not
pertinent; Fire Extinguishing Agents: Water, foam, carbon dioxide, dry chemical; Fire Extinguishing
Agents Not To Be Used: Not pertinent; Special Hazards of Combustion Products: Irritating smoke
containing maleic anhydride may form in fire; Behavior in Fire: Not pertinent; Ignition Temperature
: Data not available; Electrical Hazard: Not pertinent; Burning Rate: Not pertinent.
Chemical Reactivity - Reactivity with Water: No reaction; Reactivity with Common Materials: May
corrode metals when wet; Stability During Transport: Stable; Neutralizing Agents for Acids and
Caustics: Hush with water, rinse with dilute solution of sodium bicarbonate or soda ash;
Polymerization: Not pertinent; Inhibitor of Polymerizm'on: Not pertinent.

MALEIC ANHYDRIDE
Chemical Designations - Synonyms: cis-Butenedioic anhydride; 2,s-Furanedione; Toxilic anhydride;
Chemical Fomla: OCOCH = CHCO.
Observable Characteristics - Physical State (as shipped): Solid or liquid; Color: Colorless; Odor:
Acrid; choking.
Physical and Chemical Properties - Physical State at 15 "c and I atm. : Solid; Molecular Weight:
98.06; Boiling Point at I atm. : 392,200,473; Freezing Point: 127,53,326; Critical Temperature: Not
pertinent; Critical Pressure: Not pertinent; Speczfic Gravity: 1.43 at 15 "C (solid); Vapor (Gas) Specific
Gravity: Not pertinent; Ratio of Specific Heats of Vapor (Gas): Not pertinent; Latent Heat of
Vaporization: Not pertinent; Heat of Combustion: -5936, -3298, -138.1; Heat of Decomposition: Not
pertinent.
Health Hazards Information - Recommended Personal Protective Equipment: Approved organic
vapor-acid gas canister; chemical goggles and face shield; rubber gloves and boots; coveralls or rubber
apron; Symptoms Following Exposure: Inhalation causes coughing, sneezing, throat irritation. Skin
contact causes irritation and redness. Vapors cause severe eye irritation; photophobia and double vision
may occur; General Treatment for Exposure: INHALATION give oxygen. EYE OR SKIN
CONTACT: flush with lots of water for at least 15 min.; for eyes, call a physician. For molten maleic
burns, remove crust and treat as chemical and thermal burn; Toxicity by Inhalation (Threshold Limit
Value): 0.25 ppm; Short-Term Inhalation Limits: Data not available; Toxicity by Ingestion: Grade 2,
LD,, 0.5 to 5 glkg; Late Toxicity: None; Vapor (Gas) Im'tant Characteristics: Vapors cause moderate
irritation such that personnel will find high concentrations unpleasant. The effect is temporary; Liquid
or Solid Irritant Characteristics: Causes smarting of the skin and first-degree burns on short exposure;
may cause secondary burns on long exposure; Odor i7hreshold 1.3-2.0 mg/m3.