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Eastman Dimethylacetamide
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Producer: 
Eastman
Dimethylacetamide (DMAc) is a colorless, high boiling, polar, hygroscopic liquid. DMAC is a good solvent for a wide range of organic and inorganic compounds and it is miscible with water, ethers, esters, ketones and aromatics compounds. It is used in the production of polyacrylonitrile and polyurethane based fibers, films and coatings. The polar nature of DMAC enables it to act as a combined solvent and reaction catalyst in many reactions producing high yields and pure product in short time periods. DMAC is a dipolar aprotic solvent used for many organic reactions and industrial applications. It is a versatile solvent due to its high boiling point and good thermal and chemical stability. 1. Acrylic fibres DMAC is applied as solvent in wet spinning processes for the production of acrylic fibres. 2. Elasthane fibres In the production of polyurethane-based elasthane fibres, DMAC is the solvent of choice given its evaporation speed, whether it is used in wet or dry spinning processes. 3. Pharmaceuticals DMAC can be used both as a solvent and as a reagent in the production of various pharmaceuticals. In the production of novel x-ray contrast media, DMAC is used as a solvent. Cephalosporins, which are among one of the leading classes of antibiotics, are partly produced from derivatives of 7-ADCA (7-aminodeacetoxy-cephalosporanic acid). DMAC is used in the manufacturing process. 4. Various polymers DMAC is a good solvent for polyimide resins, both in coating and film production. It is also the ideal solvent for the production of dialyser membranes, based on polysulfones. A mixture of DMAC and lithium chloride is a useful solvent for cellulose fibres in several applications.

Eastman Dimethylacetamide

Producer: 
Eastman
Dimethylacetamide (DMAc) is a colorless, high boiling, polar, hygroscopic liquid. DMAC is a good solvent for a wide range of organic and inorganic compounds and it is miscible with water, ethers, esters, ketones and aromatics compounds. It is used in the production of polyacrylonitrile and polyurethane based fibers, films and coatings. The polar nature of DMAC enables it to act as a combined solvent and reaction catalyst in many reactions producing high yields and pure product in short time periods. DMAC is a dipolar aprotic solvent used for many organic reactions and industrial applications. It is a versatile solvent due to its high boiling point and good thermal and chemical stability. 1. Acrylic fibres DMAC is applied as solvent in wet spinning processes for the production of acrylic fibres. 2. Elasthane fibres In the production of polyurethane-based elasthane fibres, DMAC is the solvent of choice given its evaporation speed, whether it is used in wet or dry spinning processes. 3. Pharmaceuticals DMAC can be used both as a solvent and as a reagent in the production of various pharmaceuticals. In the production of novel x-ray contrast media, DMAC is used as a solvent. Cephalosporins, which are among one of the leading classes of antibiotics, are partly produced from derivatives of 7-ADCA (7-aminodeacetoxy-cephalosporanic acid). DMAC is used in the manufacturing process. 4. Various polymers DMAC is a good solvent for polyimide resins, both in coating and film production. It is also the ideal solvent for the production of dialyser membranes, based on polysulfones. A mixture of DMAC and lithium chloride is a useful solvent for cellulose fibres in several applications.
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Applications & Uses

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Recommended Uses
  • Fibers
  • Process solvents

Properties

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Physical Properties
ValueUnitsTest Method / Conditions
Boiling Point166.0°C
Freezing Point-20.0°C
Chemical Properties
ValueUnitsTest Method / Conditions
Hydrolysis(Acids)CH3CON(CH3)2 + H2O + HCI -> CH3COOH + (CH3)2NH.HCI
Saponification(Bases)CH3CON(CH3)2 + NaOH -> CH3COONa + (CH3)2NH
Alcoholysis(Ions)CH3CON(CH3)2 + ROH -> CH3COOR + (CH3)2NH
Typical Properties
ValueUnitsTest Method / Conditions
Molecular FormulaC4H9NO
Molecular Weight87.12g/mol
Density at 20 C0.942g/cm3
Density (40 °C)0.923g/cm3
Dissociation constant, pKa (25°C)-0.19
Evaporation Rate172.0
Flash Point - Closed Cup64.0°C
Free energy of formation (25°C)288.0kJ/mol
Hansen solubility parameters (25°C) Dispersion7.87(MPa)½
Hansen solubility parameters (25°C) Hydrogen Bonding10.2(MPa)½
Hansen solubility parameters (25°C) Polar11.5(MPa)½
Hansen solubility parameters (25°C) Total22.7(MPa)½
Partition Coefficient (n-octanol/waterlogPow)-0.77
pH (200 g/l)44016.0
Refractive Index1.438
Surface Tension (at 20°C)33.8mN/m
Surface Tension (40°C)30.9mN/m
Surface Tension (60°C)28.3mN/m
Vapor Density (air = 1)3.02
Vapor pressure at 20°C1.78hPa
Vapor Pressure (21.7°C)2.0hPa
Vapor Pressure (40°C)6.6hPa
Vapor Pressure (60°C)20.16hPa
Viscosity (20°C)1.02mPa·s
Viscosity (25°C)0.92mPa·s
Viscosity (40°C)0.78mPa·s
Viscosity (60°C)0.62mPa·s
Viscosity (at 25°C, 15w% solution)Acryloid®(a) A-2123.0mPa.s
Viscosity (at 25°C, 15w% solution)Acryloid®(a) A-10723.0mPa.s
Viscosity (at 25°C, 15w% solution)Acryloid®(a) A-7220.0mPa.s
Viscosity (at 25°C, 15w% solution)Lucite®(b) 4426.0mPa.s
Viscosity (at 25°C, 15w% solution)Lucite®(b) 4538.0mPa.s
Viscosity (at 25°C, 15w% solution)Lucite®(b) 4630.0mPa.s
Viscosity (at 25°C, 15w% solution)Epon®(c) 10015.0mPa.s
Viscosity (at 25°C, 15w% solution)Epon®(c) 10026.0mPa.s
Viscosity (at 25°C, 15w% solution)Epon®(c) 10047.0mPa.s
Viscosity (at 25°C, 15w% solution)Epon®(c) 100710.0mPa.s
Viscosity (at 25°C, 15w% solution)Half sec butyrate555.0mPa.s
Viscosity (at 25°C, 15w% solution)EAB-500-1(d)950.0mPa.s
Viscosity (at 25°C, 15w% solution)EAS-171-2(d)1275.0mPa.s
Viscosity (at 25°C, 15w% solution)Uformite®(e) F-22220.0mPa.s
Viscosity (at 25°C, 15w% solution)MM-5515.0mPa.s
Viscosity (at 25°C, 15w% solution)VYHH(f)52.0mPa.s
Viscosity (at 25°C, 15w% solution)VAGH(f)53.0mPa.s
Viscosity (at 25°C, 15w% solution)VMCH(f)48.0mPa.s
Viscosity (at 25°C, 15w% solution)Geon® 121(g)230.0mPa.s
Viscosity (at 25°C, 15w% solution)Geon® 101(g)3500.0mPa.s
Viscosity (at 25°C, 15w% solution)HB-14 Nitrocellulose18.0mPa.s
Iso-octane33.0g / 100 g DMAc
Di-isobutyleneCompletely miscible
N-HexaneCompletely miscible
N-heptane31.0g / 100 g DMAc
CyclohexaneCompletely miscible
CyclohexeneCompletely miscible
Kerosene16.0g / 100 g DMAc
Electrical Properties
ValueUnitsTest Method / Conditions
Dielectric Constant 10 kHz (25°C)37.8
Dipole moment3.7D (debye)
Thermal Conductivity (20°C)169.2mW/m.K
Thermal Conductivity (40°C)161.2mW/m.K
Thermal Conductivity (60°C)153.3mW/m.K
Combustion Properties
ValueUnitsTest Method / Conditions
Auto Ignition Temperature345.0°C
Heat of Combustion25.45kJ/mol
Heat of Vaporization (25°C)53.2kJ/mol
Specific Heat (20°C)0.175kJ/mol.K

Documents (3)

Name
Type
Dimethylacetamide (DMAc) Sales Specifications Sheet
Other
Active, excipient, and intermediate ingredients for pharmaceuticals
Other
Eastman ingredients for pharmaceuticals
Other