2-amino-5-(4-aminophenyl)benzenesulfonic acid

2-amino-5-(4-aminophenyl)benzenesulfonic acid is an aromatic organic compound with the molecular formula C12H12N2O3S and CAS number 2051-89-0. This sulfonic acid derivative contains two amino groups and has a molecular weight of 264.3 g/mol. It belongs to the class of aminobenzenesulfonic acids and is characterized by its biphenyl structure with sulfonic and amino functional groups that provide specific chemical reactivity for various industrial applications.

2-amino-5-(4-aminophenyl)benzenesulfonic acid is a solid compound at room temperature with a molecular weight of 264.3 g/mol. The presence of sulfonic acid and amino groups makes it highly polar and typically water-soluble. The compound exhibits typical aromatic characteristics due to its biphenyl structure. Its physicochemical behavior is influenced by the ionizable sulfonic acid group and the basic amino groups, which can affect solubility and stability under different pH conditions.

2-amino-5-(4-aminophenyl)benzenesulfonic acid is primarily used as an intermediate in the synthesis of dyes and pigments due to its aromatic structure with reactive amino groups. It serves as a building block in the production of azo dyes and other colorants for textile, printing, and coating industries. The compound may also find applications in pharmaceutical intermediates and specialty chemical synthesis where its specific functional group arrangement provides desired chemical properties for further derivatization.

2-amino-5-(4-aminophenyl)benzenesulfonic acid should be handled using standard laboratory safety practices including wearing appropriate personal protective equipment such as safety glasses, gloves, and lab coats. Work should be conducted in well-ventilated areas or under fume hoods to avoid inhalation of dust particles. Avoid skin and eye contact, and prevent ingestion. Use proper handling techniques to minimize dust generation and ensure good hygiene practices including thorough handwashing after handling the material.

2-amino-5-(4-aminophenyl)benzenesulfonic acid should be stored in a cool, dry, and well-ventilated area away from direct sunlight and heat sources. Keep the material in tightly sealed containers to prevent moisture absorption and contamination. Store away from strong oxidizing agents and incompatible materials. Maintain storage temperatures within recommended ranges and ensure proper labeling of containers. Regular inspection of storage conditions and container integrity helps maintain product quality and workplace safety.

In case of skin contact with 2-amino-5-(4-aminophenyl)benzenesulfonic acid, immediately wash the affected area with plenty of soap and water for at least 15 minutes. For eye contact, flush thoroughly with clean water for at least 15 minutes and seek medical attention. If inhaled, move the person to fresh air and seek medical advice if respiratory irritation occurs. In case of ingestion, rinse mouth with water and seek immediate medical attention. Always consult a physician if symptoms persist or worsen.

2-amino-5-(4-aminophenyl)benzenesulfonic acid waste must be disposed of according to local, national, and international environmental regulations. The material should not be discharged into sewers or waterways without proper treatment. Contact licensed waste disposal companies for proper handling and treatment of chemical waste. Consider recovery or recycling options where feasible. Ensure proper classification and documentation of waste streams according to applicable waste codes and regulations before disposal.

2-amino-5-(4-aminophenyl)benzenesulfonic acid is classified under ADR Class 8 (corrosive substances), Packing Group III for transport purposes. This classification requires appropriate packaging, labeling, and documentation according to dangerous goods regulations. Use UN-approved packaging suitable for corrosive materials and ensure proper hazard labels are affixed. Transport vehicles must comply with ADR requirements including equipment and driver training. Shipping documentation must include proper shipping names and classification codes.

2-amino-5-(4-aminophenyl)benzenesulfonic acid is subject to standard chemical regulations including REACH registration requirements in Europe for manufacture, import, or use above specified tonnage thresholds. The substance is not currently listed as a SVHC (Substance of Very High Concern) under REACH. Compliance with CLP regulation for classification, labeling, and packaging is required. Users must follow workplace safety regulations and environmental protection laws applicable in their jurisdiction for handling and use of chemical substances.

2-amino-5-(4-aminophenyl)benzenesulfonic acid is available through OYSI, a leading European distributor of specialty chemicals and intermediates. OYSI provides reliable supply chains across Europe with proper documentation and regulatory compliance support. As a professional chemical distributor, OYSI ensures product quality, appropriate packaging, and technical support for industrial customers. Contact OYSI directly for availability, specifications, and pricing information to meet your specific application requirements and delivery needs.