N,N-Dimethyl-1,4-phenylenediamine
Agrochemicals 2025-03-02
N,N-Dimethyl-1,4-phenylenediamine
Chemical Name: N,N-Dimethyl-1,4-phenylenediamine
Synonyms: DMPD; 4-Amino-N,N-dimethylaniline
CAS Number: 99-98-9
Molecular Formula: C₈H₁₂N₂
Molecular Weight: 136.20 g/mol
Physical & Chemical Properties
| Property | Specification |
|---|---|
| Appearance | Colorless to dark brown crystalline solid (oxidizes in air) |
| Odor | Amine-like |
| Melting Point | 34-37°C (93-99°F) |
| Boiling Point | 262°C (504°F) |
| Density | 1.036 g/cm³ (20°C) |
| Solubility | Soluble in water, ethanol, ether, acetone |
| Oxidation | Rapidly darkens in air (store under N₂) |
Hazard & Safety Information (GHS)
Danger Symbols:
☠️ Acute Toxicity (Category 3)
⚠️ Skin Sensitization (Category 1)
Hazard Codes:
• H301: Toxic if swallowed
• H311: Toxic in contact with skin
• H317: May cause allergic skin reaction
• H331: Toxic if inhaled
Precautionary Measures:
• P261: Avoid breathing dust/fume
• P280: Wear gloves/protective clothing
• P301+P310: IF SWALLOWED: Call poison center
Chemical Behavior
• Reactivity:
- Strong reducing agent
- Forms colored charge-transfer complexes
- Reacts violently with oxidizers
• Light Sensitivity: Degrades under UV light
Applications
✔ Photographic developer
✔ Redox indicator (analytical chemistry)
✔ Polymerization inhibitor
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