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MALEIC ANHYDRIDEICSC: 0799
September 1997
CAS #: 108-31-62,5-Furandione
Dihydro-2,5-dioxofuran
Maleic acid anhydride
cis-Butenedioic anhydride
UN #: 2215
EINECS #: 203-571-6

  ACUTE HAZARDS PREVENTION FIRE FIGHTING
FIRE & EXPLOSION Combustible.  Finely dispersed particles form explosive mixtures in air.  NO open flames.  Closed system, dust explosion-proof electrical equipment and lighting. Prevent deposition of dust.  Use water spray, alcohol-resistant foam, carbon dioxide. NO powder.   

 STRICT HYGIENE! PREVENT DISPERSION OF DUST!  
  SYMPTOMS ACUTE HAZARDS FIRST AID
Inhalation Burning sensation. Cough. Sore throat. Shortness of breath. Wheezing.  Use local exhaust or breathing protection.  Fresh air, rest. Half-upright position. Refer for medical attention. 
Skin Dry skin. Redness. Pain. See Notes.  See Notes. Protective clothing.  First rinse with plenty of water for at least 15 minutes, then remove contaminated clothes and rinse again. 
Eyes Redness. Pain. Burns.  Wear safety goggles or eye protection in combination with breathing protection if powder.  First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention. 
Ingestion Nausea. Abdominal pain. Burning sensation. Vomiting. Diarrhoea.  Do not eat, drink, or smoke during work.  Rinse mouth. Give one or two glasses of water to drink. Do NOT induce vomiting. Refer for medical attention . 

SPILLAGE DISPOSAL CLASSIFICATION & LABELLING
Personal protection: face shield, thermal gloves, chemical protection suit and particulate filter respirator adapted to the airborne concentration of the substance. See Notes. Sweep spilled substance into covered containers. 

According to UN GHS Criteria

 

Transportation
UN Classification
UN Hazard Class: 8; UN Pack Group: III 

STORAGE
Dry. Separated from strong oxidants, strong bases and food and feedstuffs. 
PACKAGING
Airtight.
Do not transport with food and feedstuffs. 
MALEIC ANHYDRIDE ICSC: 0799
PHYSICAL & CHEMICAL INFORMATION

Physical State; Appearance
COLOURLESS OR WHITE CRYSTALS WITH PUNGENT ODOUR. 

Physical dangers
 

Chemical dangers
The solution in water is a medium strong acid. Reacts with strong bases and strong oxidants. 

Formula: C4H2O3
Molecular mass: 98.1
Boiling point: 202°C
Melting point: 53°C
Density: 1.5 g/cm³
Solubility in water: reaction
Vapour pressure, Pa at 25°C: 25
Relative vapour density (air = 1): 3.4
Flash point: 102°C c.c.
Auto-ignition temperature: 477°C
Explosive limits, vol% in air: 1.4-7.1 


EXPOSURE & HEALTH EFFECTS

Routes of exposure
The substance can be absorbed into the body by inhalation of its aerosol, through the skin and by ingestion. 

Effects of short-term exposure
The substance is severely irritating to the eyes, skin and respiratory tract. Inhalation may cause asthma-like reactions. 

Inhalation risk
A harmful contamination of the air can be reached rather quickly on evaporation of this substance at 20°C. 

Effects of long-term or repeated exposure
Repeated or prolonged contact may cause skin sensitization. Repeated or prolonged inhalation may cause asthma. 


Occupational exposure limits
 

ENVIRONMENT
 

NOTES
Reacts violently with fire extinguishing agents such as powder.
Depending on the degree of exposure, periodic medical examination is suggested.
The symptoms of asthma often do not become manifest until a few hours have passed and they are aggravated by physical effort.
Rest and medical observation are therefore essential.
Anyone who has shown symptoms of asthma due to this substance should avoid all further contact with this substance.
Maleic anhydride is transported also as hot liquid (70°C); contact of the skin should be avoided.
The odour warning when the exposure limit value is exceeded is insufficient. 

ADDITIONAL INFORMATION
  EC Classification
Symbol: C; R: 22-34-42/43; S: (2)-22-26-36/37/39-45 

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    See Also:
       Toxicological Abbreviations