1,2-dinitrobenzene

1,2-dinitrobenzene is an organic chemical compound with the molecular formula C6H4N2O4 and CAS number 25154-54-5. It belongs to the family of nitroaromatic compounds, featuring two nitro groups (-NO2) attached to adjacent positions on a benzene ring. With a molecular weight of 168.11 g/mol, this substance is classified as highly toxic and environmentally hazardous, requiring careful handling and storage protocols in industrial applications.

1,2-dinitrobenzene typically appears as a yellowish crystalline solid at room temperature with a characteristic aromatic odor. The compound has limited solubility in water but dissolves readily in organic solvents such as alcohol, ether, and benzene. Its melting point and boiling point are relatively high due to the presence of electron-withdrawing nitro groups, which also contribute to its chemical stability under normal conditions.

1,2-dinitrobenzene serves primarily as an intermediate in the synthesis of dyes, pigments, and other organic compounds in the chemical industry. It is used in the production of certain pharmaceuticals and as a precursor for manufacturing various aromatic amines through reduction processes. Additionally, it finds application in research laboratories for organic synthesis and as a standard reference material in analytical chemistry applications.

Safe handling of 1,2-dinitrobenzene requires 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 to prevent inhalation exposure. Due to its Acute Tox. 1 and 2 classifications, avoid skin contact and ingestion. Use non-sparking tools and equipment, and ensure proper grounding to prevent static electricity buildup during handling operations.

Proper storage of 1,2-dinitrobenzene requires a cool, dry, well-ventilated area away from heat sources, sparks, and open flames. Store in tightly sealed containers made of compatible materials, separated from incompatible substances such as strong oxidizers and reducing agents. Maintain storage temperatures below 25°C and ensure containers are properly labeled with hazard information. Implement appropriate containment measures to prevent environmental release in case of spills.

Immediate first aid for 1,2-dinitrobenzene exposure includes removing contaminated clothing and flushing affected skin or eyes with plenty of water for at least 15 minutes. If inhaled, move the person to fresh air immediately and seek medical attention. In case of ingestion, do not induce vomiting and contact poison control or emergency services immediately. Due to its high toxicity classification, professional medical evaluation is essential for any significant exposure incident.

Disposal of 1,2-dinitrobenzene must comply with local, national, and EU waste regulations as it is classified as hazardous waste. The substance should be collected in appropriate containers and disposed of through licensed hazardous waste disposal facilities. Incineration at high temperatures in specialized facilities is typically required. Small laboratory quantities may be treated through chemical neutralization by qualified personnel before disposal, following established protocols for nitroaromatic compounds.

Transportation of 1,2-dinitrobenzene falls under ADR Class 6.1 (toxic substances) with Packing Group II classification. Packages must bear appropriate hazard labels including GHS06, GHS08, and GHS09 pictograms with 'Danger' signal word. Use approved packaging suitable for toxic substances and ensure proper documentation including safety data sheets. Carriers must be qualified for dangerous goods transport and follow ADR regulations for loading, segregation, and emergency procedures.

1,2-dinitrobenzene is subject to various European regulations including REACH registration requirements and CLP classification as a hazardous substance. While not currently listed as an SVHC (Substance of Very High Concern), its high toxicity profile means it may be subject to workplace exposure limits and environmental discharge restrictions. Users must comply with occupational health regulations and may need special permits for certain quantities or applications in some EU member states.

1,2-dinitrobenzene is available through specialized chemical distributors in Europe, including OYSI, which supplies high-quality chemical products to industrial and research customers across the European market. Due to its hazardous classification, purchase typically requires proper documentation of intended use and compliance with local regulations. Professional buyers should ensure their supplier provides complete safety documentation and meets all regulatory requirements for hazardous chemical distribution.