N,N-Dimethylacetamide[2]

Updated: 2026-09-13

Overview

N,N-Dimethylacetamide (DMAC) is a polar aprotic solvent with a wide range of industrial applications. It is prized for its ability to dissolve both polar and nonpolar compounds, making it a versatile choice in chemical synthesis and material processing. The compound is produced industrially through the reaction of dimethylamine with acetic anhydride or acetyl chloride. Its high boiling point and thermal stability make it suitable for high-temperature reactions, while its miscibility with water and organic solvents enhances its utility in formulations.

Physical and Chemical Properties

DMAC is a colorless to pale yellow liquid with a faint amine-like odor. It has a density of 0.94 g/cm³ at 20°C and a boiling point of 165°C, which allows it to remain stable under most industrial conditions. Its key chemical properties include high solvency power for resins, polymers, and electrolytes, as well as low volatility. DMAC is hygroscopic and can absorb moisture from the air, which may affect its performance in sensitive applications. It is also chemically stable under normal conditions but may decompose at high temperatures or in the presence of strong acids or bases.

Main Applications

DMAC is extensively used in the pharmaceutical industry as a solvent for drug synthesis, particularly for antibiotics and other active pharmaceutical ingredients (APIs). Its ability to dissolve a wide range of compounds makes it invaluable in formulation development. In the polymer industry, DMAC is a key solvent for producing polyacrylonitrile (PAN) fibers, polyimide films, and other high-performance materials. It is also employed in the production of adhesives, coatings, and plastics where high solvency and thermal stability are required. Additionally, DMAC finds use in electronics for manufacturing lithium-ion battery electrolytes and printed circuit boards.

Safety and Storage

DMAC poses moderate health risks, including potential skin and respiratory irritation. Prolonged exposure can lead to dermatitis or systemic effects, so proper personal protective equipment (PPE) such as gloves and respirators is essential. Storage should be in tightly sealed containers made of stainless steel or polyethylene, away from heat sources and oxidizing agents. The compound is flammable and should be kept in well-ventilated areas with spill containment measures. Disposal must comply with local environmental regulations due to its potential toxicity to aquatic life.

B2B Procurement Guide

When procuring DMAC, buyers should prioritize suppliers with ISO or GMP certifications, especially for pharmaceutical-grade material. Key specifications to verify include purity (typically 99.5% or higher), water content, and absence of heavy metal contaminants. Bulk purchases (drum or tanker quantities) often yield cost savings, but storage capacity and shelf-life considerations must be evaluated. Logistics planning should account for DMAC's classification as a hazardous material, requiring proper labeling and transportation compliance. Negotiating long-term contracts with suppliers can stabilize pricing and ensure consistent quality.