1,2-phenylenediamine

II. Manufacturing Methods

1. Reduction of o-Dinitrobenzene (Mainstream Process)

• Raw Material: o-Dinitrobenzene
• Process: Catalytic reduction with hydrogen or hydrazine hydrate (Raney Ni or Pd/C catalyst)
• Yield: 90-95%
• Advantages: Mature technology, low cost, suitable for large-scale production

2. Catalytic Hydrogenation

• Reduced from o-nitroaniline, suitable for high-purity products

III. Core Advantages

IV. Applications

1. Dye Industry

• Key intermediate for azo dyes and disperse dyes
• Used in basic dyes and fluorescent dyes

2. Pharmaceutical Intermediates

• Intermediate for anti-tumor and antibacterial drugs
• Phenazine compound synthesis (anti-cancer activity)

3. Optoelectronic Materials

• OLED material precursor
• Carbazole derivatives for organic semiconductors

4. Epoxy Resin Curing Agent

• Forms high-performance curing systems with epoxy resins