Maleic anhydride CAS#108-31-6
Versatile Chemical Reactivity: Maleic anhydride exhibits excellent reactivity and can participate in various chemical reactions, including esterification and diene synthesis, making it a valuable industrial intermediate.
Broad Solvent Compatibility: It is soluble in common organic solvents such as acetone, chloroform, and ether, providing good adaptability in different chemical processing systems.
Important Industrial Intermediate: Widely used as a key raw material for producing various downstream chemicals, resins, coatings, and specialty materials.
High Purity Solid Form: Available as a colorless to white crystalline solid with defined physical properties, ensuring consistent quality for industrial applications.
Products Description of Maleic Anhydride CAS#108-31-6
Maleic anhydride, also known as the anhydride of maleic acid, is a colorless to white solid with a slightly acidic odor at room temperature. Its molecular formula is C₄H₂O₃, with a molecular weight of 98.06.
It can be obtained as needle-shaped crystals from solvents such as chloroform or ether. The compound has a melting point of 60°C, a boiling point of 82°C (1.8665 kPa), and a relative density of 1.3146.
Maleic anhydride is soluble in acetone, chloroform, and ether, while slightly soluble in petroleum ether. It reacts with water to form cis-butenedioic acid, reacts with alcohols to produce esters, and can undergo diene addition reactions with compounds containing conjugated double bonds. Due to its chemical properties, it is toxic and highly irritating to mucous membranes, requiring proper handling and safety precautions.
Parameters
| Melting point | 51-56 °C (lit.) |
| Boiling point | 200 °C (lit.) |
| density | 1.48 |
| bulk density | 700-800kg/m3 |
| vapor density | 3.4 (vs air) |
| vapor pressure | 0.16 mm Hg ( 20 °C) |
| refractive index | 1.4688 (estimate) |
| Fp | 218 °F |
| storage temp. | Store below +30°C. |
| solubility | Chloroform (Slightly), Ethyl Acetate (Slightly) |
| pka | 0[at 20 ℃] |
| form | powder |
| color | White |
| PH | 0.8 (550g/l, H2O, 20℃)Hydrolysis |
| Odor | Mild acrid odor. |
| explosive limit | 1.4-7.1%(V) |
| Water Solubility | 79 g/100 mL (25 ºC) |
| Sensitive | Moisture Sensitive |
| Merck | 145704 |
| BRN | 106909 |
| Henry's Law Constant | (atm?m3/mol): Not applicable - reacts with water |
| Exposure limits | NIOSH REL: TWA 1 ppm (0.25 mg/m3), IDLH 10 ppm; OSHA PEL: TWA 0.25 ppm; ACGIH TLV: TWA 0.25 ppm with an intended change of 0.1 ppm. |
| Dielectric constant | 51.0（60℃） |
| Stability: | Stable. Combustible. Incompatible with water, strong oxidizing agents, alkali metals, strong bases, amines, most common metals, polymerization catalysts and accelerators. |
| InChIKey | FPYJFEHAWHCUMM-UHFFFAOYSA-N |
| LogP | -2.61 at 20℃ |
| CAS DataBase Reference | 108-31-6(CAS DataBase Reference) |
| NIST Chemistry Reference | 2,5-Furandione(108-31-6) |
| EPA Substance Registry System | Maleic anhydride (108-31-6) |
Safety Information
| Hazard Codes | C |
| Risk Statements | 22-34-42/43 |
| Safety Statements | 22-26-36/37/39-45 |
| OEB | C |
| OEL | TWA: 1 mg/m3 (0.25 ppm) |
| RIDADR | UN 2215 8/PG 3 |
| WGK Germany | 1 |
| RTECS | ON3675000 |
| F | 21 |
| Autoignition Temperature | 870 °F |
| TSCA | Yes |
| HS Code | 2917 14 00 |
| HazardClass | 8 |
| PackingGroup | III |
| Hazardous Substances Data | 108-31-6(Hazardous Substances Data) |
| Toxicity | LD50 orally in Rabbit: 1090 mg/kg LD50 dermal Rabbit 2620 mg/kg |
| IDLA | 10 mg/m3 |
Product Application of Maleic anhydride CAS# 108-31-6
It is used as raw material for producing 1,4-butanediol, γ-butyrolactone, tetrahydrofuran, succinic acid, unsaturated polyester resin, alkyd resin, etc. It is also used in medicine and pesticides.
