Dimethylamine , 2.0MinTHF , 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
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 | n |
| 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℃ |
| 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) |
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 |
| F | 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 |
