MSDS Name:   Maleic anhydride
Synonym:   MA; 2,5-Furandione; cis-Butenedioic anhydride; Maleic acid anhydride.
Company:   AboutChem.com

**** SECTION 2 - COMPOSITION, INFORMATION ON INGREDIENTS ****

+----------------+--------------------------------------+----------+-----------+
| CAS# | Chemical Name | % | EINECS# |
|----------------|--------------------------------------|----------|-----------|
| 108-31-6 |Maleic anhydride | 99 | 203-571-6 |
+----------------+--------------------------------------+----------+-----------+
Hazard Symbols: C
Risk Phrases: 22 34 42/43

**** SECTION 3 - HAZARDS IDENTIFICATION ****

EMERGENCY OVERVIEW
Harmful if swallowed. Causes burns. May cause sensitization by
inhalation and skin contact.Moisture sensitive.

Potential Health Effects
Eye:
Causes eye burns. Exposure to high fume concentrations cause
photophobia, double vision, and "halo" vision.
Skin:
May cause skin sensitization, an allergic reaction, which becomes
evident upon re-exposure to this material. Contact with skin causes
irritation and possible burns, especially if the skin is wet or
moist.
Ingestion:
Harmful if swallowed. Causes gastrointestinal tract burns.
Inhalation:
May cause asthmatic attacks due to allergic sensitization of the
respiratory tract. Causes chemical burns to the respiratory tract.
Inhalation of high concentrations may cause pulmonary edema.
Chronic:
Prolonged or repeated skin contact may cause dermatitis. Repeated
exposure may cause allergic respiratory reaction (asthma).

**** SECTION 4 - FIRST AID MEASURES ****

Eyes:
In case of contact, immediately flush eyes with plenty of water for
at least 15 minutes. Get medical aid immediately.
Skin:
In case of contact, immediately flush skin with plenty of water for
at least 15 minutes while removing contaminated clothing and shoes.
Get medical aid immediately. Wash clothing before reuse.
Ingestion:
If swallowed, do NOT induce vomiting. Get medical aid immediately.
If victim is fully conscious, give a cupful of water. Never give
anything by mouth to an unconscious person.
Inhalation:
If inhaled, remove to fresh air. If not breathing, give artificial
respiration. If breathing is difficult, give oxygen. Get medical aid.
Notes to Physician:

**** SECTION 5 - FIRE FIGHTING MEASURES ****

General Information:
As in any fire, wear a self-contained breathing apparatus in
pressure-demand, MSHA/NIOSH (approved or equivalent), and full
protective gear. This material in sufficient quantity and reduced
particle size is capable of creating a dust explosion. Vapors may be
heavier than air. They can spread along the ground and collect in
low or confined areas. Contact with metals may evolve flammable
hydrogen gas.
Extinguishing Media:
Use water spray or carbon dioxide. Do not use dry chemical powder
extinguisher because they contain carbonates which react with
product.

**** SECTION 6 - ACCIDENTAL RELEASE MEASURES ****

General Information: Use proper personal protective equipment as indicated
in Section 8.
Spills/Leaks:
Vacuum or sweep up material and place into a suitable disposal
container. Clean up spills immediately, observing precautions in the
Protective Equipment section. Avoid generating dusty conditions.
Provide ventilation.

**** SECTION 7 - HANDLING and STORAGE ****

Handling:
Wash thoroughly after handling. Remove contaminated clothing and
wash before reuse. Minimize dust generation and accumulation. Do not
get in eyes, on skin, or on clothing. Keep away from strong bases
and metals. Do not breathe dust or fumes. Use only with adequate
ventilation.
Storage:
Store in a tightly closed container. Store in a cool, dry,
well-ventilated area away from incompatible substances. Corrosives
area. Store protected from moisture. Store away from alkalies.
Separate from oxidizing materials.

**** SECTION 8 - EXPOSURE CONTROLS, PERSONAL PROTECTION ****

Engineering Controls:
Facilities storing or utilizing this material should be equipped
with an eyewash facility and a safety shower. Use adequate general or
local exhaust ventilation to keep airborne concentrations below the
permissible exposure limits.
Exposure Limits
CAS# 108-31-6:
United Kingdom, WEL - TWA: 1 mg/m3 TWA
United Kingdom, WEL - STEL: 3 mg/m3 STEL
United States OSHA: 0.25 ppm TWA; 1 mg/m3 TWA
Belgium - TWA: 0.25 ppm VLE; 1 mg/m3 VLE
France - VLE: 1 mg/m3 VLE
Germany: 0.1 ppm TWA; 0.41 mg/m3 TWA
Japan: 0.1 ppm OEL; 0.4 mg/m3 OEL
Japan: 0.2 ppm Ceiling; 0.8 mg/m3 Ceiling
Malaysia: 0.25 ppm TWA; 10 mg/m3 TWA
Netherlands: 0.1 ppm MAC; 0.4 mg/m3 MAC
Russia: 1 mg/m3 TWA
Spain: 0.25 ppm VLA-ED; 1 mg/m3 VLA-ED

Personal Protective Equipment

Eyes:
Wear chemical splash goggles.
Skin:
Wear appropriate protective gloves to prevent skin
exposure.
Clothing:
Wear appropriate protective clothing to prevent skin
exposure.
Respirators:
Follow the OSHA respirator regulations found in 29
CFR 1910.134 or European Standard EN 149. Use a
NIOSH/MSHA or European Standard EN 149 approved
respirator if exposure limits are exceeded or if
irritation or other symptoms are experienced.

**** SECTION 9 - PHYSICAL AND CHEMICAL PROPERTIES ****

Physical State: Solid
Color: white
Odor: pungent odor - acrid odor
pH: 2.42 (0.01 M soln)
Vapor Pressure: 0.16 mm Hg @ 20 deg C
Viscosity: 1.6 mPa.s @60 deg C
Boiling Point: 200 deg C @ 760 mm Hg
Freezing/Melting Point: 52-55 deg C
Autoignition Temperature: 477 deg C ( 890.60 deg F)
Flash Point: 102 deg C ( 215.60 deg F)
Explosion Limits, lower: 1.4 vol %
Explosion Limits, upper: 7.1 vol %
Decomposition Temperature: >150 deg C
Solubility in water: 79g/100 ml water (25C)
Specific Gravity/Density: 1.48
Molecular Formula: C4H2O3
Molecular Weight: 98.06

**** SECTION 10 - STABILITY AND REACTIVITY ****

Chemical Stability:
Stable under normal temperatures and pressures. Moisture sensitive.
Slowly hydrolyzed by moisture to maleic acid.
Conditions to Avoid:
Dust generation, metals, exposure to moist air or water.
Incompatibilities with Other Materials:
Strong oxidizing agents, strong reducing agents, alcohols, alkali
metals, alkaline earth metals, amines, carbonates, pyridine, ammonium
ions, hydroxides, olefins + catalyst (may undergo uncontrolled
co-polymerization).
Hazardous Decomposition Products:
Carbon monoxide, carbon dioxide.
Hazardous Polymerization: Has not been reported

**** SECTION 11 - TOXICOLOGICAL INFORMATION ****

RTECS#:
CAS# 108-31-6: ON3675000
LD50/LC50:
CAS# 108-31-6: Dermal, guinea pig: LD50 = >20 gm/kg; Draize test,
rabbit, eye: 1% Severe; Oral, mouse: LD50 = 465 mg/kg; Oral, rabbit:
LD50 = 875 mg/kg; Oral, rat: LD50 = 400 mg/kg; Skin, rabbit: LD50 =
2620 mg/kg.
Carcinogenicity:
Maleic anhydride -
Not listed by ACGIH, IARC, or NTP.
Other:
See actual entry in RTECS for complete information.

**** SECTION 12 - ECOLOGICAL INFORMATION ****

Ecotoxicity:
Fish: Bluegill/Sunfish: LC50 = 138 mg/L; 48 Hr.; UnspecifiedFish:
Mosquito Fish: LC50 = 240 mg/L; 96 Hr.; UnspecifiedBacteria:
Phytobacterium phosphoreum: EC50 = 44.0 mg/L; 30 Minutes; Microtox
test

**** SECTION 13 - DISPOSAL CONSIDERATIONS ****

Dispose of in a manner consistent with federal, state, and local regulations.

**** SECTION 14 - TRANSPORT INFORMATION ****

IATA
Shipping Name: MALEIC ANHYDRIDE
Hazard Class: 8
UN Number: 2215
Packing Group: III
IMO
Shipping Name: MALEIC ANHYDRIDE
Hazard Class: 8
UN Number: 2215
Packing Group: III
RID/ADR
Shipping Name: MALEIC ANHYDRIDE
Hazard Class: 8
UN Number: 2215
Packing group: III
USA RQ: CAS# 108-31-6: 5000 lb final RQ; 2270 kg final RQ

**** SECTION 15 - REGULATORY INFORMATION ****

European/International Regulations
European Labeling in Accordance with EC Directives
Hazard Symbols: C
Risk Phrases:
R 22 Harmful if swallowed.
R 34 Causes burns.
R 42/43 May cause sensitization by inhalation and
skin contact.
Safety Phrases:
S 22 Do not breathe dust.
S 26 In case of contact with eyes, rinse immediately
with plenty of water and seek medical advice.
S 36/37/39 Wear suitable protective clothing, gloves
and eye/face protection.
S 45 In case of accident or if you feel unwell, seek
medical advice immediately (show the label where
possible).
WGK (Water Danger/Protection)
CAS# 108-31-6: 1
Canada
CAS# 108-31-6 is listed on Canada's DSL List.
CAS# 108-31-6 is listed on Canada's Ingredient Disclosure List.
US FEDERAL
TSCA
CAS# 108-31-6 is listed on the TSCA inventory.

**** SECTION 16 - ADDITIONAL INFORMATION ****

MSDS Creation Date: 1/16/2002 Revision #2 Date: 4/29/2004

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