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N,N-Dimethylacetamide (N,N-Dimethylacetamide)

Product 250 650 1000 1400 1800 2000 3000

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N,N-Dimethylacetamide

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N,N-Dimethylacetamide
Dimethylamide acetate
DIMETHYL ACETAMIDE
N-N-Dimethylacetamide
N,N-dimethyl-acetamide
N-Acetyldimethylamine
Acetdimethylamide
DMAC
Acetamide, N,N-dimethyl-
Dimethylacetone amide
Acetic acid-dimethylamide
Acetamide,N,N-dimethyl
DMA
N,N-Dimethylethanamide
acetic acid dimethylamide
N,N-Dimethylacetamid

+Expand -Stow

127-19-5

C4H9NO

87.12

Product 250 650 1000 1400 1800 2000 3000

2924199090

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Product Description

PTMG-1000 and PTMEG-1000 are the same substance, polytetrahydrofuran ether glycol.

physical and chemical properties
A white vinegar-like solid that becomes a transparent liquid when the temperature exceeds room temperature. Easily soluble in alcohols, esters, ketones, aromatics and chlorinated hydrocarbons, insoluble in ester hydrocarbons and water. When the molecular weight increases, the solubility decreases. At room temperature, PTMEG has water absorption. Its water absorption depends on the size of the molecular weight, and it can absorb 2% of water at the highest.
product specifications:
product 250 650 1000 1400 1800 2000 3000
product molecular weight 250±25 650±25 1000±50 1400±50 1800±50 2000±50 3000±100
viscosity (40 ℃ cp) 50 205 270 660 1215 1225 1350
refractive index (nD25) 1.462 1.462 1.463 1.463 1.464 1.464 1.464
melting point (Tm,℃) -5 19 24 26 28 32 35
hydroxyl number (mgKOH/g) 408.0-498.7 166.2-179.5 106.9-118.1 77.4-83.1 60.6-64.1 54.7-57.5 36.2-38.7
moisture (wt ppm) 250max 200max 200max 200max 150max 200max
chromaticity (APHA) 40 max
acid value (mgKOH/g) max 0.05
peroxide (wt,ppm as H2O2) 2 max
volatility (wt ppm) 0.1 max
stability (wt ppm as BHT) 250±50
flash point (open cup) ≥ 260
metal (wt ppm as Fe) 1 max

Nature Description

Colorless transparent liquid, flammable. It can be mixed with organic solvents such as water, alcohol, ether, Ester, benzene, trichloromethane and aromatic compounds. Freezing point-20 ℃, boiling point 166 ℃,96 ℃(10.7kPa),85-87 ℃(4.4kPa),74-74.5 ℃(3.47kPa),66-67 ℃(2.0kPa),62-63 ℃(1.6kPa), relative density 0.9366(25/4 ℃),0.9599(0/4 ℃), refractive index 1.4380. Flash point (Open Cup) 70℃.

0.937

164-166℃

-20℃

66℃

MISCIBLE

1.437-1.439

MISCIBLE

Product Applications

Used as raw material for synthetic fiber and excellent polar solvent for organic synthesis; Used for organic synthesis, also used as solvent, catalyst and paint-remove agent; DMAC is mainly used as synthetic fiber (acrylic nitrile) and polyurethane spinning and synthetic polyamide resin solvent, also used to separate the extraction of styrene from the C8 fraction..

Production method

1. Acetic anhydride dimethylamine and acetic anhydride are acylated at 0℃ to 20℃, then acetic acid is neutralized at low temperature with liquid alkali, sodium acetate is separated, and the neutralized solution is washed with alkali and rectified, take the boiling range 164-166.5 ℃ fraction as the finished product. Raw material consumption quota: Acetic anhydride (95)1150kg/t; Dimethylamine (40)1898kg/t. 2. Acetyl chloride method can also be prepared by the reaction of dimethylamine and acetyl chloride. Compared with the current acetic anhydride process in China, the production cost is reduced and the economic benefits are improved. 3. Acetic acid method Fushun Chemical Equipment Research Institute adopts acetic acid and dimethylamine synthesis method and has achieved good results. This process is characterized by adopting advanced catalytic reaction distillation technology, which strengthens the reaction, reduces energy consumption, greatly improves the separation effect and product yield, and simplifies the process. Compared with the process of synthesizing dimethylacetamide by acetic anhydride, the production cost is reduced and the economic benefits are improved. Currently, China has many uses. 4. Carbonyl synthesis method foreign studies the method of carbonylation synthesis of trimethylamine and carbon monoxide to generate N,N-dimethylacetamide. The reaction uses iron, cobalt, nickel iodide or bromide as catalyst.

Security

Dangerous Goods Marking： T

Safety instructions： S45: If you have an accident or feel uncomfortable, go to the doctor for help immediately (it is better to bring the product container label). S53: Avoid exposure-read the special instructions before using.

Hazardous material category code： R61: may cause harm to the newborn baby.

Symbols： GHS07,GHS08

Storage conditions： Complete packaging, light loading and unloading, ventilation in the warehouse, away from open flame, high temperature, and separate storage from oxidant and acid

Cautionary Statement： P201;P261;P280;P302+P352+P312;P304+P340+P312;P308+P313

Signal word： Danger

Hazard Statement： H312+H332;H319;H360D