N-methylpyrrolidone is an organic substance with chemical formula CfiveHnineNO，It is a colorless to light yellow transparent liquid with slight ammonia smell. It is miscible with water in any proportion and is soluble in various organic solvents such as ether, acetone, ester, halohydrocarbon and aromatic hydrocarbon. It is almost completely mixed with all solvents.[1]
1. Character: colorless transparent oily liquid with slight smell of amine.
2. Density: 1.028g/cmthree
3. Melting point: - 24 ℃
4. Boiling point: 202 ℃
5. Refractive index: 1.470
6 Viscosity: 1.65mPa · s
7. Flash point: 86.1 ℃
8. Flash point: 346 ℃
9. Combustion heat: 3010kJ/mol
10. Critical temperature: 445 ℃
11. Critical pressure: 4.76MPa
12. Conductivity: (1~2) × 10-8s/m
13. Solubility: soluble in water, ethanol, ether, acetone, ethyl acetate, chloroform and benzene, soluble in most organic and inorganic compounds, polar gases, natural and synthetic polymer compounds
Theoretical data
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toxicology data
1. Acute toxicity:
Mouse oral LCfifty：5130mg/kg；Oral LDs in ratsfifty：3914mg/kg
Mouse peritoneal LCfifty：3050mg/kg；Abdominal LD of ratsfifty：2472mg/kg
1. Reference value for drainage parameter calculation (XlogP): None
2. Number of hydrogen bond donors: 0
3. Number of hydrogen bond receptors: 1
4. Number of rotatable chemical bonds: 0
5. Number of tautomers: 2
6. Topological molecular polar surface area: 20.3
7. Number of heavy atoms: 7
8. Surface charge: 0
9. Complexity: 90.1
10. Number of isotope atoms: 0
11. Determine the number of atomic structure centers: 0
12. Number of uncertain atomic structure centers: 0
13. Determine the number of chemical bond structure centers: 0
14. Number of uncertain chemical bond structure centers: 0
15. Number of covalent bond units: 1
Properties and stability
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1. Colorless liquid, with ammonia odor, this product is less toxic.It is miscible with water and soluble in most organic solvents such as ether and acetone.It can dissolve most organic and inorganic compounds, polar gases, natural and synthetic polymer compounds.
2. Chemical property: relatively stable in neutral solution.At 4%sodium hydroxide50%~70% hydrolysis occurs after 8 hours in the solution.Hydrolysis gradually takes place in concentrated hydrochloric acid to generate 4-methylaminobutyric acid.Ketal or thiopyrrolidone can be produced due to carbonyl reaction
3. It interacts with olefins in the presence of alkali catalyst, and occurs in the third placeAlkylation reaction。N-methylpyrrolidone is weakly alkaline and can generate hydrochloride.It forms an adduct with heavy metal salt, for example, it is heated to 150 ℃ with nickel bromide to generate NiBrtwo(CfiveHnineON)three, melting point 105 ℃.
Operation and storage
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Storage method
Store in dryinert gasKeep the container sealed and store in a cool, dry place.
Operation precautions
Avoid exposure: special guidance is required before use.Avoid contact with skin and eyes.Avoid breathing vapor and smoke.Keep away from sources of ignition. -No fireworks.Take measures to prevent the accumulation of static electricity.
Precautions for storage
Store in a cool place.Keep the container closed and store it in a dry and ventilated place.Opened containers must be carefully resealed and kept in a vertical position to prevent leakage.Inflatable storage is sensitive to humidity
purpose
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This product is an excellent senior solvent, a polar solvent with strong selectivity and good stability, and an excellent cleaner for high-precision electronics, circuit boards, and lithium batteries.
emergency measure
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First aid measures
Inhalation: If inhaled, move the patient to fresh air.If breathing stops, perform artificial respiration.Consult a doctor.
Skin contact: wash with soap and plenty of water.Consult a doctor.
Eye contact: rinse thoroughly with plenty of water for at least 15 minutes and consult a doctor.
Ingestion: Do not induce vomiting.Do not feed anything to the unconscious by mouth.Rinse mouth with water.Consult a doctor.
Fire fighting measures
Extinguishing method and extinguishing agent: use water mist, alcohol resistant foam, dry powder or carbon dioxide to extinguish the fire.
Special hazards from this substance or mixture: carbon oxides, nitrogen oxides
Leakage emergency treatment
Protective measures, protective equipment and emergency disposal procedures for operators: use personal protective equipment.Avoid breathing vapours, fumes or gases.Ensure adequate ventilation.Remove all sources of ignition.Evacuate to a safe area.Beware of vapor accumulation to explosive concentrations.Steam can accumulate in low-lying places.
Environmental protection measures: if safety can be ensured, measures can be taken to prevent further leakage or overflow.Do not let the product enter the sewer.
The method of receiving and removing leaked chemicals and the disposal materials used: contain the overflow, collect the overflow with an anti electric vacuum cleaner or wet brush, place it in a container, and dispose according to local regulations.Place in a suitable closed container for disposal.
Control and protection
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Technical control
Operate in accordance with good industrial hygiene and safety practices.Wash hands before breaks and at the end of work.
Personal protective equipment
Eye/face protection: safety glasses with side shields meet the requirements of EN166. Please use equipment tested and approved by official standards such as NIOSH (USA) or EN 166 (EU) to protect eyes.
Skin protection: wear gloves and take out gloves, which must be checked before use.
Body protection: impermeable clothing, and the type of protective equipment must be selected according to the concentration and quantity of hazardous substances in the specific workplace.
Respiratory system protection: If the hazard assessment shows that the use of air purifying respirators is required, please use a full face mask (US) or ABEK type (EN14387) respirator cartridge as an alternate for engineering control.If the gas mask is the only way to protect, use a full face mask.Respirators use respirators and parts that have been tested and passed government standards such as NIOSH (US) or CEN (EU).
security information
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Customs code: 2933990090
Dangerous goods transportation code: UN 1268 3/PG 3[2]
