Products Description of Maleic anhydride CAS# 108-31-6
Maleic anhydride is the cyclic anhydride derived from maleic acid, with stable crystalline morphology recrystallized from chloroform or diethyl ether to form neat needle crystals.
- Melting Point: 60 ℃
- Boiling Point: 82 ℃ under 1.8665 kPa vacuum condition
- Relative Density: 1.3146 (60 ℃)
- Vapor Pressure: 0.2 mmHg at 20 ℃
- Solubility Performance: Fully soluble in acetone, chloroform and diethyl ether; slightly soluble in petroleum ether; reacts rapidly with water
Core Chemical Reactivity
- Hydrolysis: Undergoes hydrolysis with water to generate maleic acid
- Esterification: Reacts with various alcohols to produce corresponding maleate ester derivatives
- Diels-Alder cycloaddition: Highly reactive with conjugated dienes to form cyclic adducts
- Chemical Stability: Stable under sealed, cool and dry storage conditions; strictly incompatible with water, strong oxidants, strong alkalis, amines and active metals
- Safety Hazard Property: Classified as toxic corrosive hazardous chemical; causes severe irritation and damage to human eyes, skin and respiratory mucous membranes; GHS hazard label marked with Danger signal word
Parameters
| Parameter | Value |
| 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 | (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
| Item | Details |
| 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
Maleic anhydride acts as a fundamental organic chemical intermediate with cross-industry applications covering resin manufacturing, fine chemicals, pharmaceutical & agrochemical sectors:
Synthetic Resin Industry
Core raw material for producing unsaturated polyester resin and alkyd resin; key feedstock to synthesize downstream chemical products including 1,4-butanediol, γ-butyrolactone, tetrahydrofuran and succinic acid
Pharmaceutical & Pesticide Manufacturing
Indispensable intermediate for the synthesis of multiple pharmaceutical active pharmaceutical ingredients (APIs) and pesticide active components
Fine Chemical Auxiliary Industry
Applied in paper sizing agents, paint modifiers, lubricant oil additives, water treatment scale inhibitors, plastic processing aids and copolymer monomer production
Other Scenarios
Raw material for food-grade oil preservatives, ink additives, fumaric acid and tartaric acid synthesis
Factory and Equipment Show
Fast delivery time
Inventory 2-3 working days New production 7-10 working days
FAQ
Q1: Are you a maleic anhydride manufacturer or a trading company? Can I check your official website?
A: We are an integrated manufacturing and trading chemical enterprise with self-owned standardized production workshops and independent quality inspection laboratories. Our official website is https://www.hlhschem.com. We adopt direct factory supply mode with zero intermediate links, which effectively reduces customers’ procurement costs while maintaining stable product purity and continuous mass supply capacity. We also support customized packaging solutions and full-set export certification documents for global customers.
Q2: Can I get test samples before bulk order? What is your minimum order quantity?
A: Sample service of maleic anhydride is available for clients to test quality and performance in advance. Our formal bulk shipment MOQ is 1 full container load (1 FCL). We maintain year-round sufficient spot inventory to guarantee fast delivery after order confirmation, and our technical team can provide professional MSDS and technical parameter guidance for all inquiries.
