Maleic anhydride, CAS# 108-31-6
Maleic anhydride (MAN) is an organic compound with the molecular formula C₄H₂O₃. It is the acid anhydride of maleic acid. In its pure form, it appears as a colorless or white solid with a pungent odor. Featuring two kinds of functional groups, maleic anhydride is a highly versatile monomer, offering distinctive advantages for chemical synthesis and diverse end applications.
Maleic anhydride Chemical Properties |
Melting point | 51-56 °C (lit.) |
Boiling point | 200 °C (lit.) |
bulk density | 700-800kg/m3 |
density | 1.48 |
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) |
form | powder |
pka | 0[at 20 ℃] |
color | White |
Odor | Mild acrid odor. |
PH | 0.8 (550g/l, H2O, 20℃)Hydrolysis |
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. |
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 |
RIDADR | UN 2215 8/PG 3 |
OEB | C |
OEL | TWA: 1 mg/m3 (0.25 ppm) |
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 |
Hazard Classifications | Acute Tox. 4 Oral |
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 |
Maleic anhydride CAS#108‑31‑6
Product Application of Maleic anhydride CAS#108‑31‑6
Organic Synthesis & Diels‑Alder Reaction
Maleic anhydride acts as a highly active dienophile widely applied in Diels‑Alder cycloaddition syntheses. It readily reacts with substances carrying conjugated double‑bond structures to generate cyclic adducts, which serve as key building blocks for fine‑chemical intermediates, epoxy curing agents and high‑temperature‑resistant polymer monomers. It also participates in various copolymerization reactions to modify polymer molecular structures and enhance material comprehensive performance.
Resin & Coating Industry
It is an indispensable raw material for manufacturing alkyd‑type resins and unsaturated polyester resins. Modified resin products deliver balanced hardness, flexibility and weather resistance, extensively adopted in industrial paints, anti‑corrosion coatings, ink binders and maleated rosin production for adhesives and printing varnishes.
Agrochemical Field
Serves as core intermediate for multiple agrochemical products, including maleic hydrazide plant growth regulator and malathion organophosphorus insecticide. It supports the synthesis of herbicides and fungicide intermediates for crop protection formulations.
Pharmaceutical & Fine‑chemical Sector
Used for preparing pharmaceutical intermediates for multiple drug synthesis workflows. Its downstream derivatives can be further converted into succinic acid, fumaric acid, 1,4‑butanediol, γ‑butyrolactone and tetrahydrofuran, covering raw‑material demands for pharmaceutical processing and high‑purity industrial solvents.
Other Industrial Uses
Beyond above‑mentioned fields, maleic anhydride derivatives find uses in papermaking sizing agents, lubricant‑oil additive intermediates and water‑treatment scale‑inhibitor polymers, bringing performance improvement for paper‑making, petrochemical and circulating‑water‑treatment scenarios.
Packaging & Transportation
Available Packaging Options
Standard package: 25 kg PP woven bags with inner PE liner
Bulk‑shipping option: 1000 kg jumbo bag
Custom‑tailored packaging solutions can be offered upon client’s special requirements.
Dangerous‑goods Transport Information
UN No.: UN 2215; Hazard Class: 8; Packing Group: III; HS Code:2917 14 00.
Transport shall strictly comply with IMDG / IATA dangerous‑goods regulations. Keep goods away from strong oxidizers, strong alkali and moisture sources during transit. Avoid mixing shipment with food‑grade chemicals. Prevent package breakage, rain soaking and direct sun exposure throughout delivery.
Storage Requirements
Store products in cool, dry and well‑ventilated warehouse with temperature controlled below +30 °C. Keep packages tightly sealed to avoid moisture ingress that triggers hydrolysis and caking. Isolate from heat sources, open flame, strong‑oxidizing agents, amines and alkali metals. Shelf‑life reaches 12 months under qualified sealed‑storage conditions.
Delivery & After‑sales Service
Delivery Cycle
In‑stock goods: Shipment within 2‑3 working days
New‑batch production order: 7‑10 working‑day lead‑time
After‑sales Support
Provide complete document set including COA, SDS / MSDS, commercial invoice, packing list for customs clearance.
Support pre‑shipment sample confirmation for bulk orders.
Offer technical consultation covering product storage, handling guidance and common‑process parameter suggestions.
Respond to client quality‑related feedback promptly within working hours.
Typical Customer Cooperation Cases
Our maleic anhydride has been steadily supplied to resin manufacturers, agro‑chemical factories and fine‑chemical plants across Southeast Asia, Middle East, Europe and South America. Representative cooperation scenarios include:
Unsaturated‑polyester‑resin manufacturers for composite‑material raw‑material supply
Agro‑chemical enterprises for pesticide‑intermediate production
Fine‑chemical factories for cyclic‑synthesis intermediate sourcing
We support long‑term framework‑order cooperation as well as trial bulk orders for new project verification.
Frequently Asked Questions (FAQ)
Q1: Is sample available for Maleic anhydride?
A: Samples can be arranged. Sample freight and related fees shall be borne by buyers.
Q2: What is the MOQ for formal bulk purchase?
A: Standard MOQ is 1 FCL (Full Container Load). Small‑volume trial orders are negotiable subject to actual situation.
Q3: What hazards should be noted during manual operation?
A: This product carries corrosive and mucosal‑irritating properties. Operators shall wear chemical‑resistant gloves, safety goggles and dust‑proof respirator. Avoid dust inhalation and direct skin‑eye contact. Refer to SDS for full safety guidance.
Q4: Can product specifications be adjusted?
A: We can discuss specification adjustment according to downstream application scenarios; relevant technical confirmation is required before order confirmation.
