Products Description
N,N-Dimethyl-p-toluidine is a colorless to pale yellow oily liquid with an odor reminiscent of rotten eggs. It has a melting point of 130.31 °C, a boiling point ranging from 211.5 °C to 212.5 °C, a room-temperature density of 0.9287–0.9366 g/mL, and a refractive index of 1.5360–1.5470. Insoluble in water yet soluble in certain organic solvents, this compound decomposes under light exposure. It serves as an efficient photoinitiator for acrylonitrile (AN) polymerization and is also employed in manufacturing self-curing dental trays.
Chemical Properties
| Melting point | -25°C |
| Boiling point | 211 °C(lit.) |
| Density | 0.937 g/mL at 25 °C(lit.) |
| Vapor density | >1 (vs air) |
| Vapor pressure | 0.1 hPa (20 °C) |
| Refractive index | n20/D 1.546(lit.) |
| Fp | 182 °F |
| Storage temp | Store below +30°C. |
| Solubility | 0.65g/l |
| Form | Liquid |
| Pka | pK1:7.24(+1) (25°C) |
| Color | Clear yellow |
| Explosive limit | 0.07 |
| Water Solubility | Miscible with alcohol, ether and chloroform. Immiscible with water. |
| BRN | 774409 |
| Dielectric constant | 3.3（20℃） |
| Stability: | Stable. Combustible. Incompatible with strong oxidizing agents. |
| InChIKey | GYVGXEWAOAAJEU-UHFFFAOYSA-N |
| LogP | 1.729-2.81 at 35℃ |
| CAS DataBase Reference | 99-97-8(CAS DataBase Reference) |
| IARC | 2B (Vol. 115) 2018 |
| EPA Substance Registry System | N,N,4-Trimethylaniline (99-97-8) |
Safety Information
| Hazard Codes | T |
| Risk Statements | 23/24/25-33-52/53 |
| Safety Statements | 28-36/37-45-61-28A-51-44-36-22-20/21 |
| RIDADR | 1708 |
| WGK Germany | 3 |
| RTECS | XU5803000 |
| F | 39744 |
| Autoignition Temperature | 425 °C |
| TSCA | Yes |
| HS Code | 2921 43 00 |
| HazardClass | 6.1 |
| PackingGroup | II |
| Hazardous Substances Data | 99-97-8(Hazardous Substances Data) |
| Toxicity | LD50 orally in Rabbit: 1650 mg/kg |
Product Application
N,N-Dimethyl-p-toluidine acts as an efficient photoinitiator for acrylonitrile (AN) polymerization. The polymerization rate is proportional to the 1.62-th power of AN concentration and the 0.62-th power of DMT concentration. This compound is widely utilized as a polymerization accelerator. Furthermore, it can function as an additive in the synthesis of unsaturated polyester resins and adhesives.
