Products Description of N,N-Dimethyl-p-toluidine, CAS#99-97-8 N,N-Dimethyl-p-toluidine is a colorless or pale yellow oily liquid with a rotten egg odor. It has a melting point of 130.31℃, a boiling point of 211.5–212.5℃, a density of 0.9287–0.9366 g/mL at room temperature and a refractive index of 1.5360–1.5470. It is insoluble in water but soluble in some organic solvents, and decomposes upon exposure to light. It is an effective photoinitiator for acrylonitrile (AN) polymerization and can also be used in the production of self-curing dental trays.
N,N-Dimethyl-p-toluidine 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 of N,N‑Dimethyl‑p‑toluidine CAS#99‑97‑8**
N,N‑Dimethyl‑p‑toluidine is an effective photoinitiator for the polymerization of acrylonitrile (AN). The polymerization rate is proportional to the 1.62 power of the AN concentration and the 0.62 power of the DMT concentration. This compound is commonly used as a polymerization accelerator. In addition, it can serve as an additive in the synthesis of unsaturated polyester and adhesives.
