Butanoic acid

Butanoic acid is a short-chain saturated carboxylic acid with the molecular formula C4H8O2 and CAS number 107-92-6. Also known as butyric acid, it has a molecular weight of 88.11 g/mol and belongs to the class of organic acids. This compound is characterized by its distinctive rancid odor and is naturally found in butter, parmesan cheese, and human sweat. It serves as an important intermediate in various chemical processes and industrial applications.

Butanoic acid is a colorless liquid at room temperature with a characteristic pungent, rancid odor reminiscent of vomit or rancid butter. It has a boiling point of 163°C and is miscible with water, ethanol, and most organic solvents. The compound has a density of approximately 0.96 g/cm³ and exhibits typical carboxylic acid behavior, being acidic in aqueous solution with a pKa of about 4.82.

Butanoic acid serves multiple industrial and commercial purposes as a chemical intermediate and flavoring agent. It is used in the production of esters for artificial flavoring, particularly in food and beverage industries to create butter-like flavors. Additionally, it functions as a precursor for pharmaceuticals, plasticizers, and specialty chemicals. The compound also finds applications in animal feed additives and as a starting material for various organic synthesis reactions.

Butanoic acid requires careful handling due to its corrosive properties (Skin Corr. 1B classification). Always wear appropriate personal protective equipment including chemical-resistant gloves, safety goggles, and protective clothing. Work in well-ventilated areas or under fume hoods to avoid inhalation of vapors. Use corrosion-resistant tools and containers, and ensure emergency eyewash stations and safety showers are readily accessible. Avoid contact with skin, eyes, and clothing.

Butanoic acid should be stored in tightly sealed, corrosion-resistant containers made of compatible materials such as glass or appropriate plastics. Keep containers in a cool, dry, well-ventilated area away from heat sources and direct sunlight. Store separately from strong bases, oxidizing agents, and incompatible materials. Ensure storage areas have appropriate spill containment measures and maintain temperatures below 25°C for optimal stability and safety.

Butanoic acid contact requires immediate emergency response due to its corrosive nature. For skin contact, immediately flush the affected area with copious amounts of water for at least 15 minutes while removing contaminated clothing. In case of eye contact, rinse continuously with water and seek immediate medical attention. If inhaled, move the person to fresh air and provide oxygen if breathing is difficult. Always seek medical advice after any significant exposure.

Butanoic acid disposal must comply with local environmental regulations and waste management guidelines. The substance should be collected in appropriate containers and disposed of through licensed chemical waste disposal facilities. Do not pour down drains or release into the environment. Small quantities may be neutralized carefully with sodium bicarbonate before disposal, but always consult local authorities and waste management professionals for specific disposal requirements and procedures.

Butanoic acid is classified under ADR Class 8 (corrosive substances), Packing Group III for transportation purposes. It must be packaged in UN-approved containers suitable for corrosive liquids and properly labeled with appropriate hazard markings. Transport vehicles must carry emergency equipment and documentation. Drivers require ADR certification for dangerous goods transport. Ensure compliance with international transport regulations including proper shipping names and identification numbers.

Butanoic acid is regulated under various European chemical safety frameworks including REACH and CLP regulations. It must be classified and labeled according to CLP with the 'Danger' signal word and GHS05 pictogram for corrosive properties. The substance is not currently listed as a Substance of Very High Concern (SVHC). Companies must comply with safety data sheet requirements and appropriate risk assessment procedures for industrial use.

Butanoic acid is available through OYSI, a European distributor specializing in technical chemicals and industrial raw materials. OYSI provides high-quality butanoic acid with proper documentation including safety data sheets and certificates of analysis. As an established European chemical distributor, OYSI ensures compliance with all relevant regulations and offers reliable supply chain solutions for industrial customers requiring this corrosive organic acid for their applications.