Propanoic acid

Propanoic acid is a short-chain carboxylic acid with the molecular formula C3H6O2 and CAS number 79-09-4. It has a molecular weight of 74.08 g/mol and belongs to the family of saturated fatty acids. This organic compound is characterized by its three-carbon chain structure with a carboxyl functional group, making it the third member of the carboxylic acid series after formic and acetic acid.

Propanoic acid is a colorless liquid at room temperature with a sharp, pungent odor reminiscent of vinegar but more intense. It is highly miscible with water and most organic solvents due to its polar carboxyl group and relatively short carbon chain. The compound has a boiling point of approximately 141°C and demonstrates typical carboxylic acid behavior, including hydrogen bonding capabilities and acidic properties in aqueous solutions.

Propanoic acid is primarily used as a food preservative and mold inhibitor in the bakery industry, often in the form of its sodium or calcium salts. Industrial applications include its use as an intermediate in the production of herbicides, pharmaceuticals, and plastics. It also serves as a precursor for propionyl derivatives and is utilized in the manufacture of artificial fruit flavors and fragrances in the food and cosmetic industries.

Propanoic acid must be handled with extreme caution as it is classified as Skin Corr. 1B with the danger signal word. Essential personal protective equipment includes chemical-resistant gloves, safety goggles, and protective clothing to prevent skin and eye contact. Work should be conducted in well-ventilated areas or under fume hoods. Emergency shower and eyewash stations must be readily accessible, and direct contact with skin, eyes, or clothing must be avoided at all times.

Propanoic acid should be stored in tightly sealed, corrosion-resistant containers in a cool, dry, and well-ventilated area away from direct sunlight and heat sources. Storage areas must be equipped with appropriate ventilation systems and spill containment measures. The substance should be kept away from incompatible materials such as strong bases, oxidizing agents, and metals that may corrode. Secondary containment is recommended to prevent environmental contamination in case of leaks.

Immediate action is required in case of contact with propanoic acid due to its corrosive nature. For skin contact, immediately remove contaminated clothing and flush the affected area with plenty of water for at least 15 minutes. In case of eye contact, rinse immediately with water for at least 15 minutes while holding eyelids open. Seek immediate medical attention for any exposure. If inhaled, move the person to fresh air and seek medical assistance if breathing difficulties occur.

Propanoic acid disposal must comply with local, national, and European waste regulations as it is classified as hazardous waste. The substance should never be poured down drains or disposed of with regular waste. Disposal should be carried out through licensed hazardous waste contractors who can neutralize or incinerate the material safely. Small quantities may be neutralized carefully with appropriate bases under controlled conditions before disposal, following proper safety protocols and regulatory guidelines.

Propanoic acid is classified under ADR Class 8 (corrosive substances) Group III for transport purposes. Packaging must comply with UN specification requirements for corrosive liquids, typically using appropriate containers with proper labeling including GHS05 pictogram and hazard markings. Transport vehicles must be equipped with appropriate safety equipment and emergency response information. Drivers require ADR training certification, and transport documentation must accompany all shipments according to dangerous goods regulations.

Propanoic acid is subject to standard chemical regulations including REACH registration requirements and CLP classification as Skin Corr. 1B with GHS05 pictogram. It is not listed as a Substance of Very High Concern (SVHC) under REACH. The substance must comply with workplace exposure limits and industrial safety regulations. Food-grade applications are subject to additional food safety regulations and purity requirements when used as a preservative in the food industry.

Propanoic acid is available through OYSI, a specialized European distributor of technical chemicals serving industrial customers across Europe. OYSI provides reliable supply chains and technical support for propanoic acid procurement. As a professional chemical distributor, OYSI ensures compliance with all relevant regulations and provides appropriate safety documentation. Contact OYSI directly for specific grades, quantities, and delivery options tailored to your industrial requirements and geographic location within Europe.