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Identification |
Chinese nanme：N,N-Formyl dimethylamine | Dangerous Goods Code: 33627 | ||||||||||
| English name ：N,N-dimethyl formamide；DMF | UN number: 2265 | |||||||||||
| Molecular formula: C3H7NO | CAS No.: 68-12-2 | CAS号：68-12-2 | ||||||||||
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Physical and chemical properties |
Appearance and traits |
A colorless liquid with a weak, special odor. | ||||||||||
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Melting point (°C) |
-61 |
Relative density (water = 1) |
0.94 |
Relative density (air = 1) |
2.51 |
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Boiling point (°C) |
152.8 |
Saturated vapor pressure (kPa) |
3.46/60℃ |
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Solubility |
Miscible with water, soluble in most organic solvents. | |||||||||||
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Toxicity and health hazards |
Route of invasion |
Inhalation, ingestion, percutaneous absorption. | ||||||||||
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toxicity |
LD50: 2800mg/kg (rat oral); 5000mg/kg (rabbit percutaneous) | |||||||||||
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Health hazard |
LC50: 9400 mg/m3, 2 hours (mouse inhalation) | |||||||||||
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First aid method |
Acute poisoning: mainly eye and upper respiratory tract irritation, headache, anxiety, nausea, vomiting, abdominal pain, constipation and so on. Liver damage usually occurs several days after poisoning, the liver is swollen, the liver area is painful, and jaundice can occur. If the skin is absorbed by poisoning, the skin may have blisters, edema, and sticky, local numbness, itching, and burning. Chronic effects: skin, mucous membrane irritation, neurasthenia syndrome, low blood pressure. There are also nausea, vomiting, chest tightness, loss of appetite, stomach pain, constipation and liver and liver function changes. | |||||||||||
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Burning explosion hazard |
Flammability |
combustible |
Combustion decomposition product |
Carbon monoxide, carbon dioxide, nitrogen oxides. |
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Flash point (°C) |
58 |
Upper explosion limit % (v%): |
15.2 |
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Auto-ignition temperature (°C) |
445 |
Lower explosion limit % (v%): |
2.2 |
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Construction fire risk classification |
乙 |
Stability |
Stability |
polymerization hazard, |
no polymerization |
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Incompatibility |
Strong oxidizing agents, acid chlorides, chloroforms, strong reducing agents, halogens, chlorinated hydrocarbons. | |||||||||||
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Dangerous characteristics |
Flammable, in case of fire, high heat or contact with oxidizing agents, there is a risk of fire and explosion. It can react violently with concentrated sulfuric acid, fuming nitric acid, and even explode. Strong reaction with halides such as carbon tetrachloride. | |||||||||||
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Storage and transportation conditions |
Storage and transportation conditions: Store in a cool, ventilated warehouse. Keep away from fire and heat. It should be stored separately from oxidants, reducing agents, halogens, etc., and should not be mixed. Lightly load and unload during handling to prevent damage to packaging and containers. The tank (tank) used in transportation should have a grounding chain, and a hole partition can be arranged in the tank to reduce the static electricity generated by the shock. It is strictly forbidden to mix and mix with oxidants, reducing agents, halogens, food chemicals, etc. The vehicle exhaust pipe carrying the item must be equipped with a fire-stop device, and it is forbidden to use the mechanical equipment and tools that are prone to sparks. When transporting by road, follow the prescribed route and do not stay in residential areas and densely populated areas. | |||||||||||
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And leak handling |
Leakage treatment: evacuate personnel from the contaminated area to a safe area, prohibit unrelated personnel from entering the contaminated area and cut off the fire source. It is recommended that emergency personnel wear a poison mask and wear chemical protective clothing. A small amount of leakage: the emulsion is washed with a non-flammable dispersant, and the washing solution is diluted and placed in a waste water system. A large number of leaks: build dikes or digging pits, cover with foam, and reduce steam disasters. Transfer to a dedicated collector with an explosion-proof pump, recycle or transport to a waste disposal site for disposal. | |||||||||||