Dimethylacetamide (DMAc)

Description

1. Product Overview
Dimethylacetamide (DMAc) is a high-purity, polar aprotic solvent engineered for demanding industrial synthesis and advanced material processing. Its primary industrial use lies in the production of high-performance polymers such as polyacrylonitrile fibers, polyimide films, and engineering resins, where it acts as a critical reaction and spinning medium. The key value proposition is its exceptional thermal stability, high boiling point, and unmatched solvating power for both organic and inorganic compounds. Strategically, DMAc is indispensable for manufacturers of lithium-ion battery separators, pharmaceutical intermediates, and specialty chemicals, directly enabling supply chain efficiency in high-growth technology sectors.

2. Key Specifications & Technical Characteristics

• Chemical composition: Dimethylacetamide (CH₃C(O)N(CH₃)₂), CAS 127-19-5

• Purity grade: Industrial Grade ≥99.9% (GC analysis); Electronic Grade ≥99.95% available

• Physical form: Transparent, colorless liquid

• Key physical properties:

  • Boiling point: 165–166°C

  • Melting point: –20°C

  • Density (20°C): 0.937 g/cm³

  • Flash point (closed cup): 70°C

  • Water content: ≤0.05% (Karl Fischer)

  • Acidity (as acetic acid): ≤0.01%

• Packaging options: 190 kg (net) new steel drums, 1,000 kg IBC totes, ISO tank containers for bulk

• Shelf life: 24 months from date of manufacture when stored in original sealed containers under dry, ambient conditions (15–30°C), protected from strong oxidizers and moisture.

3. Core Industrial Applications

• Primary industries: Specialty chemicals, synthetic fibers, lithium-ion batteries, pharmaceuticals, electronics, and agrochemicals.

• Specific use cases:

  • Polymer fibers: Spinning solvent for polyacrylonitrile (PAN) – precursor to carbon fiber – enabling higher tensile strength and uniform filament formation.

  • Battery separators: Dissolving polyvinylidene fluoride (PVDF) for coating ceramic separators, improving ionic conductivity and thermal shutdown performance.

  • Pharmaceutical synthesis: Reaction medium for crystallization of APIs, reducing side reactions due to high thermal stability.

  • Electronics: Stripping formulation for photoresist removal in semiconductor manufacturing.

• Performance advantage: Compared to NMP or DMF, DMAc offers lower volatility, higher flash point (safety), and superior hydrolytic stability, leading to reduced solvent recovery costs and longer bath life in continuous processes.

4. Competitive Advantages

• Quality consistency: Batch-to-batch purity variation <0.02% via real-time GC-MS monitoring; trace metals controlled to <5 ppm.

• Supply reliability: Multi-continent production nodes (Asia, Europe, Americas) with 98.5% on-time-in-full (OTIF) delivery performance over 24 months.

• Logistics capability: Dedicated fleet of stainless steel ISO tank containers and temperature-controlled warehouses; HAZMAT Class 3 compliant globally.

• Price competitiveness: Long-term volume contracts indexed to raw material (acetic acid / dimethylamine) benchmarks, offering fixed-price and cost-plus models.

• Sustainability: Recoverable via distillation with >95% recycling efficiency; reduced VOC emissions compared to traditional solvents; non-ODS, non-SARA 313 restricted (varies by jurisdiction).

• Technical support: Full documentation – CoA, MSDS (48 languages), TDS, REACH/UK REACH/TSCA/K-REACH compliance packages, and on-site application lab access for process optimization.

5. Commercial & Supply Information

• Minimum order quantity (MOQ): 1 IBC tote (1,000 kg net) for new buyers; 190 kg drum available at premium pricing for qualification samples.

• BULK 20MT Loading capacity: Standard ISO tank container – 20,000 kg net (20 MT) per 20-foot container, maximizing freight efficiency for transoceanic shipments.