N,N-Dimethylacetamide (DMAc)

Description

1. Product Overview

N,N-Dimethylacetamide (DMAc) is a high-purity, polar aprotic solvent engineered for demanding industrial synthesis and material processing. Its primary industrial use lies in the production of high-performance polymers such as polyimide films, aramid fibers (e.g., Kevlar-type materials), and advanced pharmaceutical intermediates. The key value proposition is exceptional thermal stability, complete miscibility with water and most organic solvents, and superior dissolution power for intractable polymers. Strategically, DMAc is indispensable for manufacturers transitioning to lightweight, heat-resistant materials in aerospace, electronics, and electric vehicles—making it a critical enabler of next-generation engineering.

2. Key Specifications & Technical Characteristics

• Chemical composition: N,N-Dimethylacetamide (CAS 127-19-5), C₄H₉NO

• Purity grade: ≥99.9% (anhydrous grade); 99.5% (technical grade) available

• Physical form: Transparent, colorless liquid

• Key physical properties:

  • Boiling point: 165–166°C

  • Flash point: 70°C (closed cup)

  • Density: 0.937 g/cm³ at 20°C

  • Water content: ≤0.05% (anhydrous) / ≤0.2% (technical)

• Packaging options: 190 kg mild steel drums, 1,000 kg IBC totes, ISO tank containers (20 MT)

• Shelf life: 24 months from date of manufacture when stored in sealed, dry conditions at 15–30°C

3. Core Industrial Applications

• Aerospace & electronics – Polyimide film production: DMAc dissolves polyamic acid precursors for Kapton®-type films. Outperforms DMF or NMP with faster dissolution kinetics and lower residual solvent content, enabling thinner, more uniform dielectric layers.

• High-performance fibers – Aramid spinning: Used as the primary solvent in wet-spinning of para-aramid fibers. DMAc’s high dipole moment and low viscosity allow higher solids loading, reducing energy consumption per kilogram of fiber by ~15% versus alternatives.

• Pharmaceutical intermediates – API synthesis: Preferred solvent for nucleophilic substitutions and peptide coupling reactions due to its excellent stability under basic conditions and easy recovery via distillation, lowering solvent replacement costs.

• Surface coating removal – Aerospace stripping: Formulated into paint strippers for polyurethane and epoxy coatings. DMAc penetrates cross-linked networks faster than dichloromethane, with reduced volatility and lower VOC regulatory burden.

4. Competitive Advantages

• Quality consistency: ISO 9001:2025-certified production with batch-to-batch variance <0.1% via online GC-MS monitoring; each shipment includes Certificate of Analysis (CoA) with trace impurities.

• Supply reliability: Redundant manufacturing lines across three continents (Asia, Europe, Americas) with 98.5% on-time-in-full (OTIF) performance over 24 months.

• Logistics capability: Dedicated stainless-steel ISO tank fleet for anhydrous grade; nitrogen-blanketed filling prevents moisture ingress during transit.

• Price competitiveness: Direct long-term contracts with upstream methylamine and acetic acid producers; fixed quarterly pricing available for volumes ≥100 MT/year.

• Sustainability & compliance: Zero liquid discharge (ZLD) at production sites; DMAc recovered via distillation from customer waste streams (closed-loop buyback program). REACH, TSCA, and K-REACH registered.

• Technical support: In-house applications lab offering dissolution testing, solvent recycling optimization, and safety protocol validation within 48 hours.

5. Commercial & Supply Information

• Minimum order quantity (MOQ): 20 MT (one full ISO tank) for anhydrous grade; 190 kg (one drum) for technical grade samples.

• Bulk 20 MT loading capacity: Standard 20 ft ISO tank container = 20,000 kg net weight (20 MT) per container.

• Shipping terms: FOB (Houston, Rotterdam, Shanghai) or CIF major global ports.

• Lead time: 14 days for tank containers; 7 days for drums/IBCs from regional warehouses.

• Payment terms: Letter of credit (L/C) at sight or net 30 days with approved credit.