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Changzhou Jufeng Chemical Co., Ltd.

Professional management, filling armored amine series products

Transportation, sales, and storage enterprises with transportation fleets,
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Jufeng Chemical

N,N-dimethylformamide(DMF)

 

Product index

DMF product index
Index name Index Analysis result
Unit Technical index 2020.11.05
Dimethylformamide wt-% ≥99.9 99.99
Methanol wt-% ≤0.005 -
Water content wt-% ≤0.03 0.006
Alkali, as dimethylamine mg/kg ≤10 2
Acid, as formic acid mg/kg ≤10 2
Platinum-cobalt chromaticity APHA ≤10 5

Uses: Dimethylformamide products are not only a very versatile chemical raw material, but also a very versatile and excellent solvent. It can be used for wet spinning of synthetic fibers such as polyacrylonitrile fiber and synthesis of polyurethane; used for plastic film making; also used as a paint stripper for removing paint; it can also dissolve some low-solubility pigments, so that the pigments have Characteristics of dyes. In the petrochemical industry, it can be used as a gas absorbent to separate and produce sandworms; in medicine, it can be used to synthesize iodosamine, doxycycline, cortisone, vitamin B6, iodoside, repellent, pyrantel, N-methylacyl lysate sarcoma, anti-tumor acid, methoxine, chlorambucil, cylohexine nitrosourea, furfurouracil, tranexamic acid, betamethasone, megestrol, biliary He, chlorpheniramine and so on. It can also be used in product purification and gas analysis.

Properties: colorless liquid. The melting point is -61°C, the boiling point is 153°C, the relative density is 0.9487 (20/4°C), and the refractive index is 1.4304. The flash point is 57°C. It can be miscible with water, ethanol, ether, chloroform and most organic solvents, and has good solubility and chemical stability for a variety of organic and inorganic compounds. The vapor pressure at 25°C is 0.493 kPa.

 

Technical manual

Technical specification code 224
CAS No. 68-12-2
Molecular formula C3H7NO
Molecular weight 73.10

 

Physical and chemical properties

Main ingredients Pure Critical temperature (℃) 374
Appearance and traits Colorless liquid Critical pressure (MPa) 4.48
pH   Log value of octanol/water partition coefficient -0.87
Melting point (℃) -61 Flash point (℃) 58
Boiling point (℃) 152.8 Ignition temperature (℃) 445
Relative density (water = 1) 0.94 Upper explosion limit %(V/V) 15.2
Relative vapor density (air=1) 2.51 Lower explosion limit %(V/V) 2.2
Saturated vapor pressure (kPa) 3.46(60℃) Solubility Miscible with water, miscible with most organic solvents.
Combustion heat (kJ/mol) 1915 Use It is mainly used as an industrial solvent, in the pharmaceutical industry for the production of vitamins and hormones, and also for the manufacture of insecticide.

 

Toxicology Information

Acute toxicity LD50: 4000 mg/kg (rat oral); 4720 mg/kg (rabbit skin)
LC50: 9400mg/m3, 2 hours (mouse Inhale)
Subacute and chronic toxicity  
Irritating  
Sensitization  
Mutagenicity  
Teratogenicity  
Carcinogenicity  

 

Ecological information

Ecological Toxicity  
Biodegradability  
Non-biodegradability  
Bioaccumulation or bioaccumulation  
Other harmful effects This substance may be harmful to the environment, so special attention should be paid to water bodies.

 

Transport information

Dangerous Goods Number 33627
UN number 2265
Packaging logo  
Packing category O53
Packing method Common wooden boxes outside ampoules; common wooden boxes outside screw-top glass bottles, iron-capped glass bottles, plastic bottles or metal barrels (cans).
Transport considerations Transport vehicles should be equipped with corresponding types and quantities of fire-fighting equipment and leakage emergency treatment equipment during transportation. It is best to transport sooner or later in summer. The tank (tank) truck used for transportation should have a grounding chain, and a hole partition can be set in the tank to reduce vibration and static electricity. Mixed shipment and transportation with oxidants, reducing agents, halogens, edible chemicals, etc. are strictly prohibited. Avoid exposure to the sun, rain, and high temperature during transportation. Stay away from fire, heat sources, and high-temperature areas during stopovers. The exhaust pipe of the vehicle carrying the item must be equipped with a fire arrester, and it is forbidden to use mechanical equipment and tools that are prone to sparks for loading and unloading. When transporting by road, follow the prescribed route and do not stop in residential areas and densely populated areas. It is forbidden to drop off during railway transportation. It is strictly forbidden to transport in bulk by wooden ships or cement ships.

 

Regulatory Information

Regulatory Information Regulations on the Safety Management of Chemical Hazardous Materials (promulgated by the State Council on February 17, 1987), Implementation Rules for the Regulations on the Safety Management of Chemical Hazardous Materials (Hua Lao Fa [1992] No. 677), Regulations on the Safe Use of Chemicals in Workplaces ([1996] issued by the Ministry of Labor No. 423) and other regulations have made corresponding regulations for the safe use, production, storage, transportation, loading and unloading of chemical dangerous goods; the classification and marking of commonly used dangerous chemicals (GB 13690-92) classifies this substance as section 3.3 Class high flash point flammable liquid.

 

Risk overview

Risk category Class 3.3 high flash point flammable liquid
Entry route Inhalation, ingestion, transdermal absorption
Health hazard Acute poisoning: mainly eye and upper respiratory tract irritation, headache, anxiety, nausea, vomiting, abdominal pain, constipation, etc. Liver damage usually occurs a few days after poisoning, and the liver is enlarged.
Environmental hazards  
Explosion hazard This product is flammable and irritating.

 

First-aid

Risk category Class 3.3 high flash point flammable liquid
Entry route Inhalation, ingestion, transdermal absorption
Health hazard Acute poisoning: mainly eye and upper respiratory tract irritation, headache, anxiety, nausea, vomiting, abdominal pain, constipation, etc. Liver damage usually occurs a few days after poisoning, and the liver is enlarged.
Environmental hazards  
Explosion hazard This product is flammable and irritating.

 

Fire-fighting measures

Hazardous characteristics It is flammable, and may cause combustion and explosion when exposed to open flames, high heat or contact with oxidants. It can react violently with concentrated sulfuric acid and fuming nitric acid, and even explode. It can react strongly with halides (such as carbon tetrachloride).
Hazardous combustion products Carbon monoxide, carbon dioxide, nitrogen oxides.
Fire fighting methods Move the container from the fire scene to an open place as much as possible. Spray water to keep the fire container cool until the end of the fire extinguishing. Extinguishing agent: water mist, alcohol-resistant foam, dry powder, carbon dioxide, sandy soil.

 

Leakage emergency treatment

Emergency treatment Quickly evacuate personnel from the contaminated area to a safe area, isolate them, and strictly restrict access. Cut off the fire source. It is recommended that emergency personnel wear self-contained positive pressure breathing apparatus and chemical protective clothing. Cut off the source of leakage as much as possible. Prevent entry into restricted spaces such as sewers and flood drains. Small leakage: Use sand or other non-combustible materials to absorb or absorb. It can also be washed with a lot of water, and the washing water is diluted and put into the waste water system. A large number of leaks: construct a dike or dig a pit for storage.

 

Operational disposal

Operation precautions Airtight operation, full ventilation. Operators must undergo special training and strictly abide by the operating procedures. It is recommended that operators wear filter-type gas masks (half masks), chemical safety glasses, chemical protective clothing, and rubber gloves. Keep away from fire and heat sources, and smoking is strictly prohibited in the workplace. Use explosion-proof ventilation systems and equipment. Prevent the vapor from leaking into the air in the workplace. Avoid contact with oxidants, reducing agents and halogens. The flow rate of the filling should be controlled to prevent the accumulation of static electricity. When handling, please load and unload with care to prevent damage to packaging and containers. Equipped with corresponding types and quantities of fire-fighting equipment and leakage emergency treatment equipment. Empty containers may be harmful residues.
Storage precautions Store in a cool, ventilated warehouse. Keep away from fire and heat sources. Keep the container tightly closed. It should be stored separately from oxidants, reducing agents, halogens, etc., and avoid mixed storage. Use explosion-proof lighting and ventilation facilities. It is forbidden to use mechanical equipment and tools that are prone to sparks. The storage area should be equipped with leakage emergency treatment equipment and suitable storage materials.
Occupational exposure limit  
China MAC (mg/m3) 10
Former Soviet Union MAC (mg/m3) No standard
TLVTN OSHA 10ppm,30mg/m3; ACGIH 10ppm,30mg/m3
TLVWN No standard
Monitoring method Gas chromatography; hydroxylamine-iron oxide spectrophotometry.
Engineering control The production process is closed and fully ventilated. Provide safety shower and eyewash equipment.
Respiratory protection When the concentration in the air exceeds the standard, wear a filter gas mask (half mask).
Eye protection Wear chemical safety glasses.
Body protection Wear chemical protective clothing.
Hand protection Wear rubber gloves。
Other protection Smoking is strictly prohibited at the work site. After work, take a shower.

 

Stability and reactivity

Stability  
Incompatible materials

Strong oxidizer, acid chloride, chloroform, strong reducing agent, halogen, chlorinated hydrocarbon.

Conditions to avoid  
Aggregation hazard  
Decomposition products  

 

Disposal

Nature of waste  
Disposal methods Dispose of by incineration. After being mixed with fuel, it is incinerated. The nitrogen oxides discharged from the incinerator are removed by the scrubber.
Disposal considerations  

 

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