Dimethylamine (DMA), identified by CAS Number 124-40-3, is a secondary aliphatic amine that serves as a fundamental building block in the global chemical industry. At ambient temperature and pressure, it exists as a colorless, flammable gas characterized by a sharp, pungent ammoniacal or fishy odor. Industrially, DMA is synthesized through the vapor-phase catalytic reaction of methanol and ammonia over a silica-alumina catalyst, typically produced as part of a mixture alongside monomethylamine and trimethylamine.
While available in anhydrous form, it is most commonly handled as a 40% to 60% aqueous solution to improve safety and ease of transport. As a strong base ($pK_b approx 3.27$) and a potent nucleophile, dimethylamine is highly reactive, participating readily in alkylation, acylation, and condensation reactions. Its versatility makes it indispensable for manufacturing a broad spectrum of derivatives, ranging from agrochemicals and water treatment polymers to high-performance industrial solvents. Due to its high volatility and flammability, stringent safety protocols are required for its industrial management.
* Serves as a fundamental chemical intermediate across diverse industries.
* Crucial for synthesizing a wide range of pharmaceuticals and drug intermediates.
* Essential component in the production of agrochemicals, including pesticides and herbicides.
* Utilized as a key accelerator in rubber processing for improved performance.
* Acts as an effective aprotic polar solvent for various chemical reactions.
* A vital building block for manufacturing cationic surfactants and fabric softeners.
* Plays a role in water treatment applications as a flocculant precursor.
* Available in both anhydrous and various aqueous solution concentrations to suit specific needs.
* **Appearance:** Clear, colorless liquid
* **Purity, wt%:** 99.5 min
* **Water, wt%:** 0.20 max
* **Monomethylamine (MMA), wt%:** 0.05 max
* **Trimethylamine (TMA), wt%:** 0.20 max
* **Total Amines, wt%:** 99.5 min
* **Specific Gravity @ 20/20°C:** 0.680 – 0.686
* **Density @ 20°C, kg/m³:** 680 – 686
* **Flash Point (Closed Cup), °C:** -18 (DMA anhydrous)
* **Boiling Point (Anhydrous), °C:** 6.9
* **Pharmaceutical Synthesis:** Dimethylamine is a crucial building block for synthesizing various active pharmaceutical ingredients (APIs) and other drug intermediates.
* **Agrochemical Production:** It serves as an essential precursor in the manufacturing of herbicides, insecticides, and fungicides for agricultural applications.
* **Solvent Manufacturing:** DMA is a key intermediate for producing high-demand solvents like Dimethylformamide (DMF) and Dimethylacetamide (DMAC).
* **Water Treatment:** Utilized in the creation of flocculants and coagulants, which are vital for water purification processes.
* **Rubber Processing:** Acts as a vulcanization accelerator, enhancing the properties and processing of rubber and elastomeric materials.
* **Specialty Chemicals:** Employed in the synthesis of various specialty chemicals, including surfactants and catalysts, for diverse industrial uses.
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