Agrochemicals

Diphenylamine (CAS No. 122-39-4) 

1. Basic Information

• Chemical Name: Diphenylamine
• Synonyms: DPA; N-Phenylaniline; Anilinobenzene
• CAS Number: 122-39-4
• Molecular Formula: C₁₂H₁₁N
• Molecular Weight: 169.22 g/mol
• Appearance: White to light brown crystalline solid
• Odor: Floral, amine-like odor
• Odor Threshold: ~0.01 ppm

2. Physical and Chemical Properties

• Melting Point: 53–54°C (127–129°F)
• Boiling Point: 302°C (576°F)
• Density: 1.16 g/cm³ at 20°C
• Solubility:
  • Water: 0.03 g/L (20°C)
  • Organic solvents: Soluble in ethanol, ether, benzene, acetone
• Vapor Pressure: 0.001 mmHg at 25°C
• Flash Point: 153°C (307°F) (closed cup)
• Autoignition Temperature: 630°C (1166°F)

3. Chemical Structure

     ○
    / \
   /   \
  N     ○
   \   /
    \ /
     H

(Where ○ represents phenyl rings)

4. Hazards (GHS Classification)

• Acute Toxicity: Harmful if swallowed (H302)
• Skin Irritation: Causes mild skin irritation (H315)
• Eye Irritation: Causes serious eye irritation (H319)
• Environmental Hazards: Toxic to aquatic life (H411)
• NFPA Rating: Health 2, Flammability 1, Reactivity 0

5. Storage and Handling

• Storage:
  • Keep in tightly closed containers
  • Store in cool, dry, well-ventilated area
  • Protect from light and oxidizing agents
• Handling:
  • Use nitrile gloves and safety goggles
  • Avoid dust formation (use local exhaust)

6. Applications

• Explosives Industry: Stabilizer for nitrocellulose propellants
• Agriculture: Post-harvest fungicide for apples
• Rubber Industry: Antioxidant in synthetic rubbers
• Dye Manufacturing: Intermediate for azo dyes

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