Benzene-1,4-diamine

Benzene-1,4-diamine is an organic aromatic compound with the molecular formula C6H8N2 and CAS number 106-50-3. Also known as para-phenylenediamine (p-PDA), it consists of a benzene ring with two amino groups (-NH2) positioned at opposite ends (para position). With a molecular weight of 108.14 g/mol, this compound appears as crystalline solid and serves as an important industrial intermediate in chemical synthesis.

Benzene-1,4-diamine is a white to slightly pink crystalline solid at room temperature with a characteristic amine odor. It has good solubility in water, alcohol, and other polar solvents due to its amino groups. The compound is sensitive to light and air, which can cause oxidation and darkening. It has a relatively low melting point and exhibits basic properties due to the presence of two amino functional groups.

Benzene-1,4-diamine is primarily used as an intermediate in the production of aramid fibers, particularly para-aramids like Kevlar. It serves as a key component in manufacturing high-performance polymers, dyes, and pigments. The compound is also utilized in the production of antioxidants for rubber and plastics, photographic developers, and hair dyes. Its applications span across textile, automotive, and chemical industries where high-strength materials are required.

Benzene-1,4-diamine must be handled with appropriate personal protective equipment including chemical-resistant gloves, safety goggles, and respiratory protection. Work should be conducted in well-ventilated areas or under fume hoods due to its toxic properties (Acute Tox. 3) and skin sensitization potential (Skin Sens. 1). Avoid direct skin and eye contact, and prevent inhalation of dust or vapors. Emergency eyewash stations and safety showers should be readily accessible.

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 away from oxidizing agents, acids, and incompatible materials. Storage areas should be equipped with appropriate spill containment measures and maintained at stable temperatures. Containers should be clearly labeled with hazard information and stored according to local chemical storage regulations to prevent degradation and ensure safety.

In case of skin contact with benzene-1,4-diamine, immediately remove contaminated clothing and wash affected area thoroughly with soap and water for at least 15 minutes. For eye contact, flush immediately with clean water for 15-20 minutes and remove contact lenses if present. If inhaled, move to fresh air immediately. Seek medical attention promptly in all cases of exposure, especially if irritation persists or symptoms develop, due to the compound's sensitization potential.

Benzene-1,4-diamine must be disposed of as hazardous waste through licensed waste management companies in accordance with local and European regulations. Do not discharge into drains, soil, or water bodies due to its aquatic toxicity classification (Aquatic Acute 1). Contaminated packaging should also be treated as hazardous waste. Consult local environmental authorities for specific disposal requirements and approved treatment facilities in your region.

Benzene-1,4-diamine is classified under ADR Class 6.1 (toxic substances), Packing Group III for transport purposes. It must be packaged in appropriate UN-approved containers with proper labeling including GHS06 (skull and crossbones) and GHS09 (environmental hazard) pictograms. Transport documentation must include the correct shipping name, UN number, and hazard class. Only authorized carriers with proper training and equipment should handle the transportation of this substance.

Benzene-1,4-diamine is subject to CLP regulation with hazard classifications including Acute Tox. 3, Eye Irrit. 2, Skin Sens. 1, and Aquatic Acute 1, requiring 'Danger' signal word. While not currently listed as SVHC under REACH, it must comply with registration requirements for manufacturing or import above one tonne per year. Users must follow occupational exposure limits and safety data sheet requirements under European chemical legislation.

Benzene-1,4-diamine is available through OYSI, a specialized European distributor of industrial chemicals. OYSI provides reliable supply chains across Europe with proper documentation, safety data sheets, and regulatory compliance support. As a professional chemical distributor, OYSI ensures quality products meeting European standards and provides technical support for safe handling and application guidance. Contact OYSI directly for availability, specifications, and delivery options in your region.