Dimethylamine (DMA)

Dimethylamine (DMA)

CAS Number: 124‑40‑3

Chemical Formula: CH₃NH₂ in H₂O

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.

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Physical & Chemical Properties

Property Value (≈40 % in H₂O)
State (20 °C) Gas; 40% aqueous liquid common
Melting Point –93 °C
Boiling Point 7 °C
Density (gas) ~1.55× air
Flash Point (liquid) –6.7 °C CC (anhydrous)
Vapor Pressure ~1800 mmHg @20 °C
Solubility Highly soluble in water (>160 g/100 g), alcohols, ethers
Log P –0.27
NFPA H/F/R 2 / 4 / 0

Applications

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

Safety & Handling

  • 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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