Maleic anhydride
- cis-Butenedioic anhydride
- 2,5-Furanedione
- 2,5-Dihydro-2,5-dioxofuran
- 2,5-Furandione
Maleic anhydride | |
| |
| Formula | C4H2O3 |
| Structure | |
| Description | Shipped both as a solid and in the molten state. |
| Uses | In diels-alder syntheses (as a dienophile), in co-polymerization reactions, manufacture of alkyd-type of resins, dye intermediates, pharmaceuticals, agricultural chemicals (maleic hydrazide, malathion). |
Registry Numbers. | |
| CAS | 108-31-6 |
| EINECS | 203-571-6 |
| RTECS | ON3675000 |
| Std. Transport No. | 4936330 |
| RCRA | U147 |
| UN (DOT) | 2215 |
| Beilstein Reference | 5-17-11-00055 |
| Beilstein Number | 106909 |
| Merck Index | 5744 |
| 108-31-6 is listed on the TSCA. | |
Chemical and physical properties. | |
| Formula mass | 98.06 |
| Melting point, °C | 52.8 |
| Boiling point, °C | 202 |
| Vapor pressure, mmHg | 5x10-5 |
| Vapor density (air=1) | 3.4 |
| Specific gravity/density | 1.43 |
| Solubility in water | Reacts |
| Odor threshold | 1.84 mg/m3 |
Hazards and protection. | |
| Storage | Store in a cool, dry place. Store in a tightly closed container. Corrosives area. Do not store in metal containers. |
| Handling | Wash thoroughly after handling. Use only in a well ventilated area. Do not get in eyes, on skin, or on clothing. Do not ingest or inhale. |
| Protection | Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. 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 29CFR 1910.134 or European Standard EN 149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary. |
| Small spills or leaks | Sweep up or absorb material, then place into a suitable clean, dry, closed container for disposal. Avoid generating dusty conditions. |
| Stability | Stable under normal temperatures and pressures. |
| Incompatibilities | Strong oxidizing agents, stong alkalies, amines, water, steam. |
| Hazardous Decomposition | Carbon monoxide, carbon dioxide. |
| Other hazards | Corrosive to metals when in contact with water. |
Fire related information. | ||||
| NFPA | Health | 3 |
 
 |
|
| Flammability | 1 | |||
| Reactivity | 1 | |||
| Special | - | |||
| Flash Point,°C | 102 | |||
| Autoignition temp., °C | 477 | |||
| Upper exp. limit, % | 7.1 | |||
| Lower exp. limit, % | 1.4 | |||
| Fire fighting | Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. 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: Water or foam may cause frothing. For large fires, use water spray or fog. Do NOT use straight streams of water. For small fires, use carbon dioxide, dry chemical, dry sand, or alcohol-resistant foam. | |||
| Fire potential | Slightly flammable. Combustion requires preheating. | |||
| Hazards | When heated above 300¡F in the presence of various materials may generate heat and carbon dioxide. Will explode if confined. | |||
| Combustion products | Fire will produce irritating, corrosive and/or toxic gases. | |||
Health related information. | |
| Exposure limit(s) | TLV: 0.25 ppm; 1.0 mg/m3 (as TWA) (ACGIH 1997). MAK: 0.1 ppm; 0.4 mg/m3; (1996) OSHA PEL: TWA 1 mg/m3 (0.25 ppm) NIOSH REL: TWA 1 mg/m3 (0.25 ppm) NIOSH IDLH: 10 mg/m3 |
Exposure effects | |
| Prolonged or repeated skin contact may cause dermatitis. Repeated exposure may cause allergic respiratory reaction (asthma). | |
| Ingestion | Harmful if swallowed. May cause gastrointestinal irritation with nausea, vomiting and diarrhea. May cause burns to the gastrointestinal tract. |
| Inhalation | May cause asthmatic attacks due to allergic sensitization of the respiratory tract. Causes chemical burns to the respiratory tract. Inhalation of dust causes irritation of the nose and throat, coughing and sneezing. |
| Skin | May cause severe irritation and possible burns. Exposure may cause dermatitis and sensitization. |
| Eyes | Contact with eyes may cause severe irritation, and possible eye burns. Exposure to high fume concentrations cause photophobia, double vision, and "halo" vision. |
| First aid | |
| Ingestion | Never give anything by mouth to an unconscious person. Get medical aid immediately. Do NOT induce vomiting. If conscious and alert, rinse mouth and drink 2-4 cupfuls of milk or water. |
| Inhalation | Get medical aid immediately. Remove from exposure to fresh air immediately. If breathing is difficult, give oxygen. |
| Skin | Get medical aid immediately. Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse. Destroy contaminated shoes. |
| Eyes | Get medical aid immediately. Do NOT allow victim to rub or keep eyes closed. Extensive irrigation is required (at least 30 minutes). |
Shipping information. | ||
| DOT (UN) Transportation Information |
 | |
| UN number | 2215 | |
| Response guide | 156 | |
| Hazard class | 8 | |
| Packing Group | III | |