N,N-Dimethylformamide CAS 68-12-2 DMF

N,N-Dimethylformamide CAS 68-12-2 DMF Information

CAS	68-12-2
Molecular formula	C3H7NO
Molecular weight	73.09
EIENCS	200-679-5
Form	Powder
Melting point	-61 °C (lit.)
boling point	153 °C (lit.)
Density	0.944 g/mL (lit.)
Solubility	water: miscible
PKA	-0.44±0.70(Predicted)
Color	APHA: ≤15
Storage temp

What is N,N-Dimethylformamide CAS 68-12-2 DMF?

Basic chemical properties

Chemical formula: C₃H₇NO

Molecular weight: 73.09 g/mol

Appearance: Colorless and transparent liquid. Pure products have a faint ammonia smell, while industrial grades with impurities have a fishy smell.

Physical properties:

Melting point: -61℃

Boiling point: 153℃

Density: 0.948 g/cm³ (20℃)

Solubility: It is miscible with most solvents such as water, alcohols, ethers, and ketones, but not with saturated hydrocarbons (such as gasoline).

Chemical properties:

High boiling point, non-protonic polar solvent, promoting SN₂ reaction and enhancing ionic reaction activity;

It is prone to hydrolysis when exposed to strong acids or strong bases, generating dimethylamine and formic acid.

It decomposes into carbon monoxide and dimethylamine at high temperatures (>350℃).

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N,N-Dimethylformamide CAS 68-12-2 DMF Use

(1)Industrial solvents

Polymer materials: Dissolved polyurethane, polyacrylonitrile, polyvinyl chloride, etc., used in synthetic fibers (dry spinning of acrylic), plastic films and coatings.

Electronics industry: Circuit board cleaning, quenching of tin-plated components.

Gas separation: Recovery of butadiene and isoprene from the C4 / C5 fraction.

(2) Chemical raw materials

Pharmaceutical synthesis: Production of vitamins, hormones, sulfonamide drugs and antibiotics (such as doxycycline).

Pesticides and dyes: Synthetic insecticides (such as amidine), dye solvents.

Separation and purification: Selectively dissolve isophthalic acid (which has a higher solubility than terephthalic acid) and is used in the separation process.

(3) Other fields

Paint remover: Efficiently removes paint coatings;

Pigment treatment: Enhance the dispersibility of low-solubility pigments and simulate the characteristics of dyes.

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N,N-Dimethylformamide CAS 68-12-2 DMF safety

Health risk

Acute toxicity:

Irritate the eyes, respiratory tract and skin (rinse with clean water for 15 minutes after contact);

Liver injury (jaundice and pain in the liver area occurred several days later), and the oral LD₅₀ in rats was 400-2800 mg/kg.

Chronic effects: neurasthenia, abnormal liver function, low blood pressure.

Carcinogenicity: Classified as a Group 2A carcinogen (possibly carcinogenic to humans).

Environmental risk

Highly toxic to aquatic organisms (96h-LC₅₀=1430 mg/L for blackhead grouper);

The degradation half-life in the air is approximately 22 hours (hydroxyl radical action).

Operation and Emergency Response

Protective measures:

Wear gas masks, chemical protective suits and rubber gloves;

The workplace should be well-ventilated to avoid contact with fire sources (flash point 58℃, flammable).

Leakage handling

Minor leakage: Adsorb with sand and rinse with a large amount of water;

Large-scale leakage: Build embankments, cover with foam and then recycle.

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