Benzene-1,4-diamine

Benzene-1,4-diamine is an aromatic diamine compound with the molecular formula C6H8N2 and CAS number 106-50-3. This organic chemical features two amino groups (-NH2) positioned at opposite ends of a benzene ring in para configuration. With a molecular weight of 108.14 g/mol, it serves as an important intermediate in chemical synthesis and industrial applications, particularly in polymer and dye manufacturing.

Benzene-1,4-diamine is a crystalline solid at room temperature, typically appearing as white to pale yellow crystals or powder. It has moderate solubility in water and polar solvents due to its amino groups, which can form hydrogen bonds. The compound exhibits basic properties due to the presence of two amino groups and can undergo typical aromatic substitution reactions. It may darken upon exposure to air and light.

Benzene-1,4-diamine is primarily used as an intermediate in the production of polymers, particularly aramid fibers and polyimides used in high-performance materials. It serves as a key building block in manufacturing dyes, pigments, and pharmaceutical compounds. The chemical is also utilized in the production of antioxidants, corrosion inhibitors, and various specialty chemicals in industrial applications requiring aromatic diamine functionality.

Benzene-1,4-diamine requires careful handling due to its Acute Tox. 3 classification and skin sensitization properties. Essential protective equipment includes chemical-resistant gloves, safety goggles, and respiratory protection in well-ventilated areas. Avoid direct skin contact and inhalation of dust or vapors. Work in fume hoods when possible, wear long-sleeved clothing, and ensure emergency eyewash and shower facilities are accessible. Regular training on proper handling procedures is essential.

Benzene-1,4-diamine should be stored in tightly sealed containers in a cool, dry, well-ventilated area away from direct sunlight and heat sources. Keep containers away from incompatible materials such as strong oxidizing agents and acids. Store in original packaging with proper labeling and ensure adequate separation from food, feed, and drinking water. Implement appropriate inventory rotation and maintain storage temperatures below 25°C to prevent degradation.

Skin contact with benzene-1,4-diamine requires immediate removal of contaminated clothing and thorough washing with soap and water for at least 15 minutes. For eye contact, flush immediately with clean water for 15 minutes while holding eyelids open. If inhaled, move to fresh air immediately. In case of ingestion, do not induce vomiting and seek immediate medical attention. Always consult a physician after any significant exposure, providing the safety data sheet.

Benzene-1,4-diamine waste must be disposed of through licensed hazardous waste contractors in accordance with local and EU regulations. The compound cannot be disposed of in regular waste streams due to its toxicity and environmental hazard classification. Collect waste in appropriate containers, properly labeled with hazard information. Consider recovery or recycling options where feasible, and maintain detailed waste disposal records as required by environmental regulations.

Benzene-1,4-diamine is classified under ADR Class 6.1 (toxic substances), Packing Group III for transportation purposes. It must be packaged in UN-approved containers with appropriate hazard labels and documentation. Transport vehicles require proper placarding and drivers need ADR certification for dangerous goods. Ensure compliance with quantity limitations, routing restrictions, and emergency response procedures. Proper shipping papers and emergency contact information must accompany all shipments.

Benzene-1,4-diamine is subject to comprehensive EU regulations including REACH registration requirements and CLP classification as Acute Tox. 3 and Skin Sens. 1. While not currently listed as an SVHC, it requires safety data sheets and proper hazard communication. Industrial users must comply with occupational exposure limits, environmental discharge regulations, and proper waste management protocols. Regular monitoring and risk assessments may be required in workplace settings.

Benzene-1,4-diamine is available through OYSI, a trusted European distributor of specialty chemicals serving industrial customers across the continent. OYSI provides properly classified and documented chemical products with full regulatory compliance including safety data sheets and certificates of analysis. As a professional chemical distributor, OYSI ensures reliable supply chains and technical support for industrial applications requiring this aromatic diamine intermediate.