Furan-2,5-dione

Furan-2,5-dione is an organic chemical compound with the molecular formula C4H2O3 and CAS number 108-31-6. Also known as maleic anhydride, it is a cyclic anhydride derived from maleic acid. This compound has a molecular weight of 98.06 g/mol and is classified as a hazardous substance with multiple danger classifications including acute toxicity, skin corrosion, respiratory sensitization, and specific target organ toxicity after repeated exposure.

Furan-2,5-dione typically appears as white crystalline needles or pellets at room temperature. It has a sharp, acrid odor and sublimes readily, producing irritating vapors. The compound is highly soluble in water, reacting to form maleic acid, and is also soluble in acetone, chloroform, and benzene. It has a melting point around 52-56°C and readily hydrolyzes in the presence of moisture.

Furan-2,5-dione serves as an important intermediate in chemical manufacturing, particularly in the production of unsaturated polyester resins, alkyd resins, and copolymers. It is widely used in the synthesis of pharmaceuticals, agricultural chemicals, and food additives. The compound also finds applications in the manufacture of fumaric acid, malic acid, and various polymer additives for industrial processes.

Furan-2,5-dione requires careful handling due to its corrosive and sensitizing properties. Always wear appropriate personal protective equipment including chemical-resistant gloves, safety goggles, and respiratory protection. Work in well-ventilated areas or under fume extraction systems to prevent inhalation exposure. Avoid skin and eye contact completely, and ensure emergency shower and eyewash facilities are readily accessible during handling operations.

Furan-2,5-dione must be stored in tightly sealed containers in a cool, dry, well-ventilated area away from moisture and heat sources. Keep containers away from incompatible materials such as strong bases, alcohols, and oxidizing agents. Store in original packaging with proper labeling and ensure storage areas are equipped with appropriate spill containment measures and fire suppression systems.

Furan-2,5-dione contact requires immediate action due to its corrosive nature. For skin contact, immediately flush with large amounts of water for at least 15 minutes and remove contaminated clothing. In case of eye contact, rinse immediately with water for at least 15 minutes and seek medical attention. If inhaled, move to fresh air immediately. Always seek medical advice after any significant exposure.

Furan-2,5-dione disposal must comply with local and national hazardous waste regulations. The substance should be treated as corrosive hazardous waste and disposed of through licensed hazardous waste contractors. Never discharge into drains, water courses, or onto the ground. Small quantities may be neutralized carefully under controlled conditions by trained personnel before disposal, following approved procedures and local environmental regulations.

Furan-2,5-dione is classified as ADR Class 8 (Corrosive substances), Packing Group III for transport purposes. It must be packaged in approved UN specification containers with proper hazard labels and documentation. Transport vehicles must carry appropriate emergency equipment and drivers require ADR training. Shipping papers must include proper shipping names, hazard classes, and emergency response information.

Furan-2,5-dione is subject to various European regulations including REACH registration requirements and CLP classification as a hazardous substance. It is not currently listed as a Substance of Very High Concern (SVHC). Companies must comply with occupational exposure limits, safety data sheet requirements, and workplace health and safety regulations. Industrial users may need specific permits depending on quantities and applications.

Furan-2,5-dione is available through OYSI, a specialized European distributor of technical chemicals. OYSI provides high-quality furan-2,5-dione with complete regulatory documentation including safety data sheets and certificates of analysis. As an established chemical distributor, OYSI ensures reliable supply chains and regulatory compliance for industrial customers across Europe requiring this specialized chemical intermediate.