2-methylpropanoic acid

2-methylpropanoic acid is a branched-chain carboxylic acid with the molecular formula C4H8O2 and CAS number 79-31-2. Also known as isobutyric acid, it features a methyl group attached to the second carbon of a propanoic acid backbone. With a molecular weight of 88.11 g/mol, this organic compound is classified as moderately toxic (Acute Tox. 4) and requires careful handling in industrial applications.

2-methylpropanoic acid is a colorless liquid at room temperature with a characteristic pungent, rancid odor reminiscent of butter or cheese. It is highly soluble in water and most organic solvents due to its carboxylic acid functionality. The compound has a boiling point of approximately 154°C and a melting point of -47°C. Its density is around 0.95 g/cm³, making it slightly less dense than water.

2-methylpropanoic acid serves primarily as an intermediate in chemical synthesis and pharmaceutical manufacturing. It is used in the production of esters for flavoring agents, particularly in food and fragrance industries where it provides buttery or fruity notes. The compound also finds applications in the synthesis of various organic compounds, including pharmaceuticals, plasticizers, and specialty chemicals for industrial processes.

Safe handling of 2-methylpropanoic acid requires 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 exposure. The substance carries GHS07 pictogram and Warning signal word due to its Acute Tox. 4 classification. Avoid skin and eye contact, and prevent vapor accumulation in confined spaces during handling operations.

2-methylpropanoic acid should be stored in tightly sealed containers in a cool, dry, well-ventilated area away from heat sources and ignition points. Keep containers upright and protected from direct sunlight. Store separately from strong oxidizing agents, bases, and reactive metals to prevent dangerous reactions. Ensure storage areas have appropriate spill containment measures and maintain temperatures below 25°C when possible for optimal stability.

In case of skin contact with 2-methylpropanoic acid, immediately remove contaminated clothing and rinse affected area with plenty of water for at least 15 minutes. For eye contact, flush thoroughly with water for 15 minutes while holding eyelids open. If inhaled, move to fresh air immediately. If swallowed, do not induce vomiting and rinse mouth with water. Seek medical attention if irritation persists or symptoms develop.

2-methylpropanoic acid disposal must comply with local and national environmental regulations. The substance should be treated as hazardous waste and disposed of through licensed waste management facilities. Small quantities may be neutralized carefully with appropriate bases under controlled conditions by qualified personnel. Never dispose of this chemical down drains or in regular waste streams. Contact certified waste disposal companies for proper collection and treatment.

2-methylpropanoic acid is classified as ADR Class 3 (flammable liquids), Packing Group III for transportation purposes. It requires appropriate packaging according to UN regulations and proper labeling with hazard diamonds. Vehicles must carry appropriate emergency equipment and documentation. Drivers need ADR certification for transporting this substance. Ensure containers are properly sealed and secured during transport to prevent spills or leakage.

2-methylpropanoic acid is subject to European REACH regulation requiring registration for commercial use. It falls under CLP classification as Acute Tox. 4 with mandatory safety data sheet provision. The substance is not currently listed as SVHC (Substance of Very High Concern). Industrial users must comply with occupational exposure limits and workplace safety regulations. Import/export may require additional documentation depending on quantities and destinations.

2-methylpropanoic acid is available through OYSI, a trusted European distributor of specialty chemicals. OYSI supplies high-quality 2-methylpropanoic acid to industrial customers across Europe with proper documentation and regulatory compliance. As an established chemical distributor, OYSI ensures product quality, appropriate packaging, and reliable delivery while maintaining full regulatory compliance including REACH requirements and safety documentation for professional applications.