Aniline

Aniline is an aromatic amine compound with the chemical formula C6H7N and CAS number 62-53-3. It consists of a benzene ring with an amino group (-NH2) attached, making it the simplest aromatic amine. With a molecular weight of 93.13 g/mol, aniline is classified as a hazardous substance with significant toxicity concerns, including carcinogenic and mutagenic properties. It serves as a crucial building block in organic synthesis and chemical manufacturing.

Aniline is a colorless to pale yellow oily liquid with a characteristic fishy or ammonia-like odor at room temperature. It has a boiling point of 184°C and is slightly soluble in water but highly soluble in organic solvents like ethanol and benzene. The compound darkens upon exposure to air and light due to oxidation. Its aromatic amine structure gives it basic properties, and it readily forms salts with acids.

Aniline is primarily used as an intermediate in the production of polyurethane foams, dyes, and pigments. It serves as a key raw material for manufacturing methylene diphenyl diisocyanate (MDI), which is essential for polyurethane production. Additionally, aniline is used in the synthesis of pharmaceuticals, rubber processing chemicals, pesticides, and antioxidants. The textile industry also relies on aniline derivatives for producing various synthetic dyes and colorants.

Aniline requires strict safety measures due to its high toxicity and carcinogenic properties. Essential personal protective equipment includes chemical-resistant gloves, safety goggles, and respiratory protection in well-ventilated areas. Skin and eye contact must be avoided completely, as aniline can be absorbed through the skin. Work should be conducted in fume hoods with adequate ventilation, and emergency shower and eyewash stations should be readily accessible during handling operations.

Aniline must be stored in tightly sealed containers in a cool, dry, well-ventilated area away from heat sources, direct sunlight, and incompatible materials. Storage areas should be equipped with secondary containment and maintained below 25°C to prevent decomposition. The compound should be kept away from strong oxidizing agents, acids, and metals. Storage facilities must comply with local regulations for toxic substances and include appropriate fire suppression systems.

Immediate action is critical for aniline exposure due to its high toxicity. For skin contact, remove contaminated clothing and rinse affected areas with plenty of water for at least 15 minutes. In case of eye contact, flush immediately with water for 15-20 minutes while holding eyelids open. If inhaled, move the person to fresh air immediately. For ingestion, do not induce vomiting and seek immediate medical attention. Always consult emergency services for any exposure incident.

Aniline disposal must comply with local hazardous waste regulations due to its toxic and carcinogenic properties. The substance should never be poured down drains or disposed of with regular waste. Professional hazardous waste disposal services must handle aniline waste through approved methods such as high-temperature incineration with proper emission controls. All containers must be properly labeled and documented according to waste tracking requirements before disposal.

Aniline is classified as ADR Class 6.1 (toxic substances), Packing Group II, requiring specific transport protocols. It must be packaged in approved containers with proper hazard labels and documentation. Transport vehicles need appropriate placarding and emergency response information. Drivers must hold valid dangerous goods transport certificates, and shipments require proper shipping papers with emergency contact information and handling instructions for potential incidents during transit.

Aniline is subject to extensive regulatory oversight under REACH, CLP, and various national chemical safety regulations. It requires registration for commercial use and is classified with multiple hazard categories including Carc. 2, Muta. 2, and Acute Tox. 3. Although not currently listed as an SVHC, its carcinogenic and mutagenic properties place it under strict control measures. Industrial users must comply with occupational exposure limits and implement appropriate risk management measures.

OYSI serves as a reliable European distributor for aniline, providing quality chemical products to industrial customers across Europe. As an established chemical distributor, OYSI can supply aniline with proper documentation, safety data sheets, and regulatory compliance support. Professional customers requiring aniline for industrial applications can contact OYSI for availability, technical specifications, and delivery options tailored to their specific requirements and regional regulations.