N,N-Dimethylaniline
CAS Number: 121-69-7
Chemical Formula: C8H11N
Synonyms: N,N-Dimethylphenylamine, N,N-DIMETHYLACETATE, N-ACETYLDIMETHYLAMINE
Appearance: Yellow Liquid
MOQ (Minimum Order Quantity): 1 FCL (Full Container Load)
Products Description
N,N-dimethylaniline is a tertiary amine compound derived from aniline, in which both hydrogen atoms of the amino group are replaced by methyl groups. It is categorized as a dimethylaniline derivative and a representative tertiary amine substance.
Chemical Properties
| Item | Value |
| Melting point | 1.5-2.5 °C (lit.) |
| Boiling point | 193-194 °C (lit.) |
| density | 0.956 g/mL at 25 °C (lit.) |
| vapor density | 3 (vs air) |
| vapor pressure | 2 mm Hg (25 °C) |
| refractive index | n20/D 1.557(lit.) |
| Fp | 158 °F |
| storage temp. | Store below +30°C. |
| solubility | 1.2g/l |
| pka | 5.15(at 25℃) |
| form | Liquid |
| color | Clear yellow |
| PH | 7.4 (1.2g/l, H2O, 20℃) |
| Relative polarity | 0.179 |
| explosive limit | 1.2-7%(V) |
| Water Solubility | 1 g/L (20 ºC) |
| Merck | 143,234 |
| BRN | 507140 |
| Henry’s Law Constant | 4.98×10⁻⁶ atm·m³/mol at 20 °C (approximate – calculated from water solubility and vapor pressure) |
| Dielectric constant | 4.4 |
| Exposure limits | NIOSH REL: TWA 5 ppm (25 mg/m³), STEL 10 ppm (50 mg/m³), IDLH 100 ppm; OSHA PEL: TWA 5 ppm; ACGIH TLV: TWA 5 ppm, STEL 10 ppm (adopted). |
| Stability | Stable. Incompatible with strong oxidizing agents, strong acids, acid chlorides, acid anhydrides, chloroformates, halogens. Combustible. |
| InChIKey | JLTDJTHDQAWBAV-UHFFFAOYSA-N |
| LogP | 1.171 at 35℃ |
| CAS DataBase Reference | 121-69-7(CAS DataBase Reference) |
| IARC | 3 (Vol. 57) 1993 |
| NIST Chemistry Reference | Benzenamine, N,N-dimethyl-(121-69-7) |
| EPA Substance Registry System | N,N-Dimethylaniline (121-69-7) |
Safety Information
| Item | Value |
| Hazard Codes | T,N |
| Risk Statements | 61-20/21-51/53-40-23/24/25 |
| Safety Statements | 53-45-61-36/37-28A-28 |
| RIDADR | UN 2253 6.1/PG 2 |
| OEB | A |
| OEL | TWA: 5 ppm (25 mg/m³), STEL: 10 ppm (50 mg/m³) [skin] |
| WGK Germany | 3 |
| RTECS | BX4725000 |
| F | 8 |
| Autoignition Temperature | 370 °C DIN 51794 |
| TSCA | Yes |
| HS Code | 2921 42 00 |
| HazardClass | 6.1 |
| PackingGroup | II |
| Hazardous Substances Data | 121-69-7(Hazardous Substances Data) |
| Toxicity | LD50 orally in rats: 1.41 ml/kg (Smyth) |
| IDLA | 100 ppm |
Product Application
N,N-Dimethylaniline is widely used in the production of dyestuffs, and also acts as a solvent, a methylation reagent, and a curing agent for fiberglass-reinforced resins.
As an important dye intermediate, it is used in the synthesis of alkaline yellow, Crystal Violet 5BN, basic magenta green, basic lake blue BB, basic brilliant blue R, cationic red 2BL, brilliant red 5GN, violet 3BL, brilliant blue and other colorants. In the pharmaceutical industry, it is applied in the preparation of cefazolin V, sulfamonomethoxine, sulfadoxine, fluorocytosine and other active pharmaceutical ingredients. It also serves as an intermediate for vanillin, a stabilizer for colorimetric peroxidase assays, and a common reagent in organic synthesis.
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