N,N-Dimethylacetamide is an organic compound whose molecular formula is C4H9NO. DMAC is mainly used as a solvent for synthetic fibers (acrylonitrile) and polyurethane spinning and synthetic polyamide resins. It is also used as an extractive distillation solvent for separating styrene from C8 fractions, and is widely used in polymer films, coatings and medicines. . It is widely used in medicine and pesticide to synthesize antibiotics and pesticides. It can also be used as a catalyst for the reaction, an electrolytic solvent, a paint scavenger, and a variety of crystalline solvent adducts and complexes.
Physical data
1. Properties: Colorless transparent liquid.
2. Boiling point (ºC, 101.3kPa): 164.5~166, 62~63 (1.6kpa)
3. Melting point (ºC): -20
4. Relative density (g/mL, 25/4ºC): 0.9366
5. Refractive index (20ºC): 1.4384
6. Refractive index (25ºC): 1.4356
7. Viscosity (mPa s, 25ºC): 0.92
8. Viscosity (mPa s, 30ºC): 0.838
9. Flash point (ºC, open): 70
10. Flash point (ºC): 420
11. Heat of evaporation (KJ/mol, 25ºC): 53.2
12. Heat of evaporation (KJ/mol, b.p.): 43.375
13. Heat of fusion (KJ/mol): 10.43
14. Combustion heat (KJ/mol): 2546
15. Specific heat capacity (KJ/(kg·K), 20ºC, constant pressure): 2.02
16. Critical temperature (ºC): 364
17. Critical pressure (MPa): 3.9
18. Vapor pressure (kPa, 25ºC): 0.17
19. Thermal conductivity (W/(m·K), 20ºC): 0.155
20. Lower explosion limit (%, V/V, 160ºC): 2.0
21. Upper explosion limit (%, V/V, 160ºC): 11.5
22. Solubility: It has good solubility for various organic and inorganic substances. Miscible with water, ethers, esters, ketones, aromatic compounds. Soluble unsaturated aliphatic hydrocarbons, insoluble to saturated aliphatic hydrocarbons. Can dissolve acrylonitrile copolymers, vinyl resins, cellulose derivatives, styrene resins, linear polyester resins, etc.
use
Use 1 Used as a raw material for synthetic fibers and an excellent polar solvent for organic synthesis
Use 2 Used in organic synthesis, also used as solvent, catalyst and paint remover
[Use 3] DMAC is mainly used as a solvent for synthetic fibers (acrylonitrile) and polyurethane spinning and synthetic polyamide resins, and is also used as an extractive distillation solvent for separating styrene from C8 fractions, and is widely used in polymer films and coatings. and medicine. It is widely used in medicine and pesticide to synthesize antibiotics and pesticides. It can also be used as a catalyst for the reaction, an electrolytic solvent, a paint scavenger, and a variety of crystalline solvent adducts and complexes.
Usage 4 Reaction solvent for drug synthesis, solvent for synthetic fiber spinning and synthetic resin, solvent for color-forming agent of photosensitive chemicals, solvent for coatings, etc. catalyst.
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