Heptanoic acid

Heptanoic acid is a saturated carboxylic acid with the molecular formula C7H14O2 and CAS number 111-14-8. It belongs to the family of medium-chain fatty acids, consisting of a seven-carbon chain with a carboxyl group. With a molecular weight of 130.18 g/mol, it appears as a colorless to pale yellow liquid with a characteristic rancid odor. This organic compound is classified as corrosive to skin (Skin Corr. 1B) and requires careful handling due to its aggressive properties.

Heptanoic acid is a colorless to slightly yellow oily liquid at room temperature with a strong, unpleasant rancid odor. It has limited solubility in water but is readily soluble in organic solvents such as ethanol and ether. The compound has a boiling point around 223°C and a melting point of approximately -7.5°C. Its density is about 0.92 g/cm³ at 20°C, making it less dense than water. The substance is hygroscopic and can absorb moisture from air.

Heptanoic acid is primarily used as an intermediate in chemical synthesis and manufacturing processes. It serves as a precursor for the production of esters, which are utilized in fragrances, flavoring agents, and plasticizers. The compound is also employed in the manufacture of lubricants, metalworking fluids, and corrosion inhibitors. In pharmaceutical applications, it can be used as a building block for drug synthesis. Additionally, heptanoic acid finds use in the production of specialty chemicals and as a component in certain industrial formulations.

Heptanoic acid must be handled with extreme caution due to its corrosive properties (Skin Corr. 1B classification). Personnel must wear appropriate personal protective equipment including chemical-resistant gloves, safety goggles, and protective clothing. Work should be conducted in well-ventilated areas or under fume extraction systems to prevent inhalation of vapors. Avoid direct skin and eye contact at all costs. Use proper handling tools and containers made of compatible materials. Emergency eyewash stations and safety showers should be readily accessible in work areas.

Heptanoic acid should be stored in tightly sealed, corrosion-resistant containers made of suitable materials such as stainless steel or appropriate plastics. Storage areas must be cool, dry, and well-ventilated, away from direct sunlight and heat sources. Keep containers upright and ensure secondary containment to prevent spills. The storage area should be separated from incompatible materials including strong bases, oxidizing agents, and metals that may react with the acid. Regular inspection of containers for signs of corrosion or leakage is essential.

Immediate action is crucial due to heptanoic acid's corrosive nature. For skin contact, immediately remove contaminated clothing and flush the affected area with copious amounts of water for at least 15 minutes. In case of eye contact, rinse immediately with clean water for at least 15 minutes while holding eyelids open. If inhaled, move the person to fresh air immediately. For ingestion, do not induce vomiting; rinse mouth with water if conscious. Seek immediate medical attention in all cases and provide the safety data sheet to medical personnel.

Heptanoic acid must be disposed of according to local, national, and international waste regulations as hazardous chemical waste. The substance cannot be disposed of in regular drains or municipal waste systems due to its corrosive properties. Contact licensed hazardous waste disposal companies for proper collection and treatment. Small quantities may be neutralized under controlled conditions by qualified personnel before disposal, but this should only be done following appropriate safety protocols. Always consult local environmental authorities for specific disposal requirements and maintain proper waste documentation.

Heptanoic acid is classified as dangerous goods under ADR regulations with Class 8 (corrosive substances) and Packing Group III designation. Transportation requires appropriate UN-approved packaging designed for corrosive liquids, with proper labeling including GHS05 pictogram and 'Danger' signal word. Vehicles must carry appropriate documentation including transport documents and emergency response information. Drivers require ADR certification for transporting corrosive materials. Packages must be secured to prevent movement and potential leakage during transport, with emergency equipment readily available.

Heptanoic acid is subject to various European chemical regulations including REACH and CLP classifications. Under CLP, it is classified as Skin Corr. 1B with the 'Danger' signal word and GHS05 pictogram. The substance is not currently listed as a Substance of Very High Concern (SVHC) under REACH. However, suppliers must comply with registration requirements if importing or manufacturing above threshold quantities. Safety data sheets must be provided following standard formats, and workplace exposure limits may apply depending on national regulations in specific EU member states.

Heptanoic acid is available through OYSI, a trusted European distributor of industrial chemicals. OYSI provides reliable supply chains across Europe, ensuring compliance with all relevant transportation and safety regulations. As a specialized chemical distributor, OYSI offers technical support and proper documentation including safety data sheets and certificates of analysis. Their expertise in handling corrosive chemicals ensures safe delivery and customer support for proper handling procedures. Contact OYSI directly for availability, specifications, and delivery options tailored to your specific requirements and location within Europe.