A7860012
Trimethylamine solution , 25wt.%inH2O , 75-50-3
CAS NO.：75-50-3
Empirical Formula: C3H9N
Molecular Weight: 59.11
MDL number: MFCD00012478
EINECS: 200-875-0
Update time: 2022-07-08
PRODUCT Properties
| Melting point: | -117 °C (lit.) |
| Boiling point: | 3-4 °C (lit.) |
| Density | 0.63 g/mL at 20 °C (lit.) |
| vapor density | 2.09 (vs air) |
| vapor pressure | 430 mm Hg ( 25 °C) |
| refractive index | n |
| FEMA | 3241 | TRIMETHYLAMINE |
| Flash point: | 38 °F |
| storage temp. | Store at +5°C to +30°C. |
| solubility | very soluble in water, slightly soluble in alcohol, ether, benzene, toluene, xylene, ethylbenzene, chloroform maximum allowable concentration: TLV 10 p.p.m. (24 mg/m3) and STEL of 15 p.p.m. (36 mg/m3) (ACGIH 1986) |
| form | Liquid |
| pka | pKb (25°): 4.13 |
| color | Colorless |
| PH | a strong base (pH 9.8) |
| Odor | smelling like rotting fish, rotting eggs, garbage, or urine. |
| Odor Threshold | 0.000032ppm |
| explosive limit | 11.6% |
| Odor Type | fishy |
| Water Solubility | Soluble In Water, 8.9e+005 mg/L. |
| FreezingPoint | -117.1℃ |
| Sensitive | Hygroscopic |
| Merck | 14,9710 |
| JECFA Number | 1610 |
| BRN | 956566 |
| Dielectric constant | 2.9（4℃） |
| Exposure limits | ACGIH: TWA 50 ppm; STEL 100 ppm (Skin) OSHA: TWA 200 ppm(590 mg/m3) NIOSH: IDLH 2000 ppm; TWA 200 ppm(590 mg/m3); STEL 250 ppm(735 mg/m3) |
| Stability: | Stable. Incompatible with a wide variety of materials, including bases, acids, oxidizing agents, brass, zinc, magnesium, aluminium, mercury, mercury oxides, acid chlorides, acid anhydrides. Hygroscopic. Highly flammable. Readily forms explosive mixtures with air. |
| InChIKey | GETQZCLCWQTVFV-UHFFFAOYSA-N |
| LogP | 0.06 |
Description and Uses
Trimethylamine is used as a warning agent for natural gas, a synthetic flavor (fish) ingredient, and in the synthesis of photochemicals, choline salts, flotation agents, dyes, pesticides, ion-exchange resins, cationic starches, and intense sweeteners (HSDB 2006).
Organic synthesis, especially of choline salts, warning agent for natural gas, manufacture of disinfectants, flotation agent, insect attractant, quaternary ammonium compounds, plastics.
Safety
| Symbol(GHS) |    GHS02,GHS05,GHS07 |
| Signal word | Danger |
| Hazard statements | H225-H302-H314-H335 |
| Precautionary statements | P210-P233-P280-P301+P312-P303+P361+P353-P305+P351+P338 |
| Hazard Codes | Xi,C,F+,Xn,F |
| Risk Statements | 36/37/38-34-20/22-12-41-37/38-20-11 |
| Safety Statements | 26-36-45-36/37/39-16-29-39-3 |
| OEB | A |
| OEL | TWA: 10 ppm (24 mg/m3), STEL: 15 ppm (36 mg/m3) |
| RIDADR | UN 2924 3/PG 2 |
| WGK Germany | 1 |
| RTECS | YH2700000 |
| F | 3-10 |
| Autoignition Temperature | 374 °F |
| TSCA | Yes |
| DOT Classification | 2.1 (Flammable gas) |
| HazardClass | 3 |
| PackingGroup | II |
| HS Code | 29211100 |
