Home Categories Organic Chemistry Dimethylamine
A4284720

Dimethylamine , 30%solutioninmethanol , 124-40-3

Synonym(s):
DMA

CAS NO.:124-40-3

Empirical Formula: C2H7N

Molecular Weight: 45.08

MDL number: MFCD00008288

EINECS: 204-697-4

Update time: 2022-07-08

PRODUCT 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
explosive limit 14.4%
Odor Threshold 0.033ppm
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℃

Description and Uses

Dimethylamine is a colourless flammable gas at room temperature. It has a pungent, fishy, or ammonia-like odour at room temperature and is shipped and marketed in compressed liquid form. It is very soluble in water and soluble in alcohol and ether. It is incompatible with oxidising materials, acrylaldehyde, fluorine, maleic anhydride, chlorine, or mercury. Dimethylamine is a precursor to several industrially important compounds. For instance, it used in the manufacture of several products, for example, for the vulcanisation process of rubber, as detergent soaps, in leather tanning, in the manufacture of pharmaceuticals, and also for cellulose acetate rayon treatment.

dimethylamine structure

Dimethylamine is used in the manufactureof N-methylformamide, N-methylacetamide,and detergent soaps; in tanning; and as anaccelerator in vulcanizing rubber. It is commercially sold as a compressed liquid intubes or as a 33% aqueous solution..

Safety

Symbol(GHS) 
GHS02,GHS05,GHS07
Signal word  Danger
Hazard statements  H225-H314-H335-H412
Precautionary statements  P210-P233-P273-P280-P303+P361+P353-P305+P351+P338
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
OEB A
OEL TWA: 10 ppm (18 mg/m3)
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
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

RELATED PRODUCTS