Heptanoic acid

Heptanoic acid is a saturated carboxylic acid with the molecular formula C7H14O2 and a molecular weight of 130.18 g/mol. Also known as enanthic acid, it belongs to the family of medium-chain fatty acids consisting of a seven-carbon chain with a carboxyl functional group. This organic compound appears as a colorless to pale yellow liquid with a characteristic rancid odor and is classified as a corrosive substance requiring careful handling in industrial applications.

Heptanoic acid is a colorless to pale yellow liquid at room temperature with a strong, unpleasant rancid odor reminiscent of goats or cheese. It has limited solubility in water but is miscible with most organic solvents including alcohols and ethers. The compound has a boiling point of approximately 223°C and a melting point of -7.5°C. Its density is around 0.92 g/cm³, making it less dense than water, and it exhibits typical carboxylic acid chemical behavior.

Heptanoic acid serves multiple industrial purposes including the production of esters for flavoring agents and fragrances, where it provides fruity and wine-like notes. It acts as an intermediate in pharmaceutical synthesis and is used in the manufacture of plasticizers and lubricants. The compound also finds applications in the production of specialty chemicals, metal treatment processes, and as a component in certain antimicrobial formulations for industrial use.

Heptanoic acid requires careful handling due to its Skin Corr. 1B classification and corrosive properties. Essential personal protective equipment includes chemical-resistant gloves, safety goggles, face shield, and protective clothing to prevent skin and eye contact. Work in well-ventilated areas or use local exhaust ventilation to avoid inhalation of vapors. Keep emergency eyewash stations and safety showers readily accessible, and ensure all personnel are trained in proper handling procedures before use.

Heptanoic acid should be stored in tightly sealed containers made of compatible materials such as stainless steel or appropriate plastics, away from heat sources and direct sunlight. Keep in cool, dry, well-ventilated areas at temperatures below 25°C to prevent vapor formation. Store separately from strong bases, oxidizing agents, and metals to avoid incompatible reactions. Ensure proper labeling with GHS05 pictogram and maintain appropriate spill containment measures in storage areas.

Heptanoic acid contact requires immediate action due to its corrosive nature. For skin contact, immediately remove contaminated clothing and flush affected area with plenty of water for at least 15 minutes, then seek medical attention. In case of eye contact, rinse immediately with water for at least 15 minutes while holding eyelids open and obtain emergency medical care. If inhaled, move to fresh air and seek medical attention if breathing difficulties occur. Never induce vomiting if swallowed.

Heptanoic acid disposal must comply with local and European waste regulations as it is classified as hazardous waste. The compound should be collected in appropriate containers and disposed of through licensed waste management companies specializing in corrosive chemicals. Never discharge into sewers, water bodies, or soil. Small quantities may be neutralized carefully with appropriate bases under controlled conditions by trained personnel, but large amounts require professional hazardous waste disposal services following ADR transport requirements.

Heptanoic acid is classified under ADR as Class 8 (corrosive substances), Packing Group III, requiring specific transport procedures. It must be packaged in UN-approved containers with appropriate markings and labels including the GHS05 corrosive pictogram. Transport vehicles need proper placarding and documentation including transport documents specifying the hazard class. Drivers must hold valid ADR certification, and emergency response information must be available during transport. Segregation from incompatible materials is mandatory.

Heptanoic acid is subject to European REACH and CLP regulations requiring registration, classification, and labeling as Skin Corr. 1B with the danger signal word and GHS05 pictogram. It is not currently listed as a Substance of Very High Concern (SVHC) under REACH. Companies must maintain safety data sheets, implement risk management measures, and ensure proper worker training. Transport is regulated under ADR as Class 8 dangerous goods, and workplace exposure limits may apply under national occupational health regulations.

Heptanoic acid is available through OYSI, a trusted European distributor of specialty chemicals serving industrial customers across the continent. OYSI provides high-quality heptanoic acid with complete documentation including safety data sheets, certificates of analysis, and regulatory compliance information. As an established chemical distributor, OYSI ensures reliable supply chain management and technical support for industrial applications. Contact OYSI directly for specific grades, quantities, and delivery options to meet your industrial requirements.