N,N-Dimethylaniline (DMA), identified by CAS number 121-69-7, is a tertiary aromatic amine and a derivative of aniline. It appears as a colorless to light-yellow oily liquid, though it typically darkens to a reddish-brown hue upon exposure to air and light due to oxidation. Structurally, it consists of a phenyl group attached to a dimethylamino group, making it a highly electron-rich aromatic system.
Commonly produced via the catalytic alkylation of aniline with methanol under high pressure and temperature, DMA serves as a vital building block in industrial organic chemistry. It acts as a versatile intermediate for the synthesis of various dyes, pharmaceuticals, and agrochemicals. Furthermore, it plays a critical role as a polymerization tool, particularly as an accelerator for the room-temperature curing of unsaturated polyester resins. Due to its toxicity and potential for skin absorption, DMA is handled under strict industrial safety protocols, typically requiring closed-system processing and robust personal protective equipment (PPE).
* Ensures high purity for consistent and reliable results.
* Functions as a crucial intermediate in diverse chemical syntheses.
* Widely employed in the manufacture of vibrant dyes.
* Valuable precursor for pharmaceutical compounds.
* Essential component in the production of pesticides.
* Acts as an effective accelerator for polyester resin curing.
* Supports the creation of various specialty chemicals.
* Provides stabilization in Trichloroethane applications.
* Appearance: Clear liquid
* Colour (APHA): Max 10
* N,N-Dimethylaniline content (GC): Min 99.8%
* Aniline content (GC): Max 0.05%
* N-Methylaniline content (GC): Max 0.05%
* Moisture (K.F.): Max 0.05%
* Specific gravity @ 20°C: 0.956 – 0.959
* Distillation range (IBP/DBP): 192°C – 195°C
* Freezing point: 2.5°C
* **Dye Manufacturing:** Essential raw material for producing a variety of basic, acidic, and solvent dyes.
* **Pharmaceutical Synthesis:** A key building block in the creation of diverse pharmaceutical products.
* **Pesticide Production:** Used as an intermediate for synthesizing specific pesticides, including phoxim.
* **Fragrance & Flavor Industry:** Employed in the manufacture of certain spices and fragrances, such as vanillin.
* **Photographic Developers:** Crucial component in the formulation of color photographic developers like CD-1 and CD-2.
* **Polymerization & Stabilizers:** Functions as a polymerization accelerator for polymers and a stabilizer in explosive formulations.
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