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Dimethylamine Structure

Dimethylamine

Chemical Properties

Melting point −93 °C(lit.)
Boiling point 7 °C(lit.)
Density  0.89 g/mL at 25 °C
vapor density  1.55 (vs air)
vapor pressure  16.97 psi ( 55 °C)
refractive index  n20/D 1.37
Flash point 60 °F
storage temp.  Flammables area
solubility  very soluble in water (163 g/100 g water at 40°C); soluble in ethanol, ethyl ether, and many organic solvents
form  Solution
pka 10.68(at 25℃)
color  Clear slightly yellow
Odor Ammonical odour
Odor Threshold 0.033ppm
explosive limit 14.4%
Water Solubility  Miscible with water and most organic solvents.
Sensitive  Hygroscopic
Merck  14,3228
BRN  605257
Henry's Law Constant 1.75(x 10-5 atm?m3/mol) at 25 °C (Christie and Crisp, 1967)
Exposure limits TLV-TWA 10 ppm (~18 mg/m3) (ACGIH, MSHA, and OSHA); IDLH 2000 ppm (NIOSH).
Dielectric constant 6.3(0℃)
Stability Stable. Generally used as a solution in water at concentrations up to around 40%. Extremely flammable in the pure form. Incompatible with strong oxidizing agents.
LogP -0.274 at 25℃
CAS DataBase Reference 124-40-3(CAS DataBase Reference)
NIST Chemistry Reference Methanamine, N-methyl-(124-40-3)
EPA Substance Registry System Dimethylamine (124-40-3)

Safety Information

Hazard Codes  F+,Xn,C,F,T
Risk Statements  12-20-37/38-41-34-20/22-11-39/23/24/25-23/24/25-52/53-40-19
Safety Statements  3-16-26-29-36/37/39-45-39-61
RIDADR  UN 2924 3/PG 2
WGK Germany  2
RTECS  IP8750000
3
Autoignition Temperature 753 °F
TSCA  Yes
DOT Classification 2.1 (Flammable gas)
HazardClass  3
PackingGroup  II
HS Code  29211100
Hazardous Substances Data 124-40-3(Hazardous Substances Data)
Toxicity Acute oral LD50 for guinea pigs 340 mg/kg, mice 316 mg/kg, rats 698 mg/kg, rabbits 240 mg/kg (quoted, RTECS, 1985).
IDLA 500 ppm

MSDS

Usage And Synthesis

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