Maleic anhydride #CAS108-31-6
Maleic Anhydride (MAN) is an organic compound with the chemical formula C4H203. It is the acid anhydride of maleic acid and in its pure state it is a colourless or white solid with an acrid odour. Maleic anhydride is truly a remarkable molecule in that it possesses two types of chemical functionality making it uniquely useful in chemical synthesis and applications.
Maleic Anhydride is a multifunctional chemical intermediate with applications in several fields of chemical industry. Its major end use is as feedstock in the production of unsaturated polyester resins (UPR).
These resins are used both in glass-reinforced and in unreinforced applications. The UPR end uses includes a wide range of applications in construction, marine and automobile industries.
Maleic anhydride is colorless needles, white lumps, or pellets. Irritating, choking odor. Dissolves in water to produce maleic acid. Dissolves in ethanol and produces esters.
Application of Maleic anhydride
Maleic Anhydride is heterocyclic compound used in the manufacture of unsaturated polyester resins. It has a wide range of other applications; it is used in synthetic tensides, insecticides, herbicides and fungicides.
Maleic anhydride is used in Diels-Alder syntheses (as a dienophile), manufacture of alkyd-type of resins, dye intermediates, pharmaceuticals, agricultural chemicals (maleic hydrazide, malathion), in copolymerization reactions.
Delignified wood esterified by Maleic anhydride (MA) exhibits higher charge content, superior mass gain, efficient recycling capability of the reaction medium (MA could be recycled five times, while TEMPO cannot be recycled), and integrity of the final products (retaining intact geometry vs. complete disintegration) compared to TEMPO-oxidized delignified wood (TEMPO-DW). The esterification method mediated by MA provides an eco-friendly pathway for modifying wood, serving as a platform for creating diverse materials, potentially offering innovative concepts and insights for wood modification research.
| Maleic anhydride Chemical Properties |
| 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 | 14,5704 |
| BRN | 106909 |
| Henry's Law Constant | (atmm3/mol): Not applicable - reacts with water |
| Exposure limits | ACGIH:TLV-TWA 0.01 mg/m3 (0.0025 ppm),Inhalable fraction and vapor Dermal Sensitizer (DSEN) and Respiratory Sensitizer (RSEN) A4 — Not Classifiable as a Human Carcinogen OSHA:PEL-TWA 0.25 ppm (1 mg/m3) NIOSH:REL-TWA 1 mg/m3 |
| 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. |
| Cosmetics Ingredients Functions | FILM FORMING |
| InChI | 1S/C4H2O3/c5-3-1-2-4(6)7-3/h1-2H |
| InChIKey | FPYJFEHAWHCUMM-UHFFFAOYSA-N |
| SMILES | O=C1OC(=O)C=C1 |
| 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 III (MALEIC ANHYDRIDE) |
| RIDADR | UN 2215 8/PG III (MALEIC ANHYDRIDE, MOLTEN) |
| WGK Germany | 1 |
| RTECS | ON3675000 |
| F | 21 |
| Autoignition Temperature | 870 °F |
| TSCA | TSCA listed |
| HS Code | 2917 14 00 |
| HazardClass | 8 |
| PackingGroup | III |
| Storage Class | 6.1D - Non-combustible acute toxic Cat.3 toxic hazardous materials or hazardous materials causing chronic effects |
| Hazard Classifications | Acute Tox. 4 Oral Eye Dam. 1 Resp. Sens. 1 Skin Corr. 1B Skin Sens. 1A STOT RE 1 Inhalation |
| Hazardous Substances Data | 108-31-6(Hazardous Substances Data) |
| Toxicity | LD50 orally in Rabbit: 1090 mg/kg LD50 dermal Rabbit 2620 mg/kg |
| IDLH | 10 mg/m3 |
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