Dimethylamine (DMA)

Dimethylamine (DMA)

CAS Number: 124 40 3

Chemical Formula: (CH₃)₂NH

Product Introduction

A colorless, flammable secondary amine—typically handled as a compressed gas or aqueous solution. It has a sharp, fishy/ammonia-like odor and is a key intermediate in producing dimethylformamide (DMF), pesticides, rubber accelerators, and pharmaceuticals.

Physical & Chemical Properties

Property Value
Appearance Colorless viscous liquid
Odor Ammonia/fish-like
Density @ 20 °C ~0.996–1.007 g/mL
Melting Point –5 to –4.9 °C
Boiling Point ~128–130 °C
Flash Point ~32–38 °C
Vapor Pressure @ 20 °C ~6–7 mm Hg
Refractive Index (n₂₀ᴅ) ~1.454
pKₐ (conj acid) ~8.33–8.36
Solubility in Water Miscible
Appearance in water (1%) pH ~10.5

Applications

  • Manufacture of DMF, pesticides, rubber accelerators, pharmaceutical intermediates
  • Use in halogenation, acid salt formation, amination chemistries

Safety & Notes

  • Extremely flammable (Class 2.1 gas), corrosive, respiratory irritant
  • GHS: H220, H225, H302, H314, H335, H412; IDLH 500 ppm; TLV 10 ppm
  • Store under pressure in gas cylinders or sealed aqueous solution; ensure PPE, ventilation, gas detection, grounding, explosion-proof fittings.
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