Butanal

Butanal is an organic aldehyde compound with the molecular formula C4H8O and CAS number 123-72-8. It has a molecular weight of 72.11 g/mol and belongs to the class of saturated aliphatic aldehydes. Butanal is classified as a flammable liquid category 2 under GHS regulations, requiring careful handling and storage. It appears as a colorless liquid with a characteristic pungent odor typical of aldehydes.

Butanal is a colorless liquid at room temperature with a strong, penetrating aldehyde odor. It has a boiling point of approximately 75°C and is partially soluble in water while being fully miscible with most organic solvents like ethanol and ether. The compound has a density lower than water and readily evaporates at room temperature. Its aldehyde functional group makes it reactive toward nucleophiles and reducing agents.

Butanal is primarily used as an intermediate in organic synthesis for producing various chemicals including butanol, butyric acid, and other aldehyde derivatives. It serves as a building block in pharmaceutical manufacturing, fragrance production, and polymer synthesis. The compound is also utilized in the production of plasticizers, resins, and rubber accelerators. Additionally, butanal finds applications in the food industry as a flavoring agent precursor.

Butanal requires careful handling due to its flammable liquid category 2 classification. Use appropriate personal protective equipment including safety goggles, chemical-resistant gloves, and flame-resistant clothing. Work in well-ventilated areas or under fume hoods to prevent vapor accumulation. Keep away from ignition sources, heat, and open flames. Ground all equipment to prevent static electricity buildup and use explosion-proof electrical equipment when necessary.

Butanal must be stored in a cool, dry, well-ventilated area away from heat sources and ignition points. Keep containers tightly closed in original packaging and store below 25°C if possible. Separate from strong oxidizing agents, acids, and bases to prevent incompatible reactions. Use appropriate secondary containment and ensure storage areas have proper fire suppression systems. Regular inspection of containers for leaks or damage is essential.

In case of skin contact with butanal, immediately remove contaminated clothing and wash the affected area with soap and plenty of water for at least 15 minutes. If eye contact occurs, rinse thoroughly with water for 15 minutes and seek medical attention. For inhalation, move the person to fresh air immediately. If ingested, do not induce vomiting and seek immediate medical attention. Always consult safety data sheets for complete first aid procedures.

Butanal waste must be disposed of according to local, national, and EU waste regulations as a hazardous chemical waste. Do not pour down drains or release into the environment. Collect waste in appropriate containers and label clearly for hazardous waste collection. Use licensed waste disposal companies for treatment or incineration at authorized facilities. Small quantities may be neutralized or treated according to approved laboratory waste procedures before disposal.

Butanal is classified under ADR class 3 (flammable liquids), packing group II for transportation. It requires appropriate UN specification packaging and hazard labeling including flammable liquid placards. Transport vehicles must comply with ADR regulations including proper ventilation and fire safety equipment. Drivers need ADR training certification, and transport documents must accompany shipments. Ensure proper segregation from incompatible materials during transport.

Butanal is regulated under several European frameworks including REACH registration requirements and CLP classification as flammable liquid category 2. It is not currently listed as a Substance of Very High Concern (SVHC). Users must comply with workplace exposure limits and safety requirements under occupational health regulations. Industrial users may need to register uses under REACH and follow chemical safety assessment requirements for safe handling and use.

Butanal is available through OYSI, a European distributor of technical chemicals serving industrial customers across Europe. OYSI provides reliable supply chains and technical support for butanal procurement. When purchasing, ensure suppliers provide complete safety documentation including safety data sheets and certificates of analysis. Verify that the supplier complies with REACH registration requirements and can provide proper transport documentation for safe delivery.