Basic chemical series – butyrolactone

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Basic Information

Chinese name - butyrolactone

Foreign name - Butyrolactone

Synonyms -γ-butyrolactone, 4-hydroxybutyrolactone, γ-hydroxybutyrolactone

Chemical formula - C4H6O2

Molecular Weight - 86.089


Density: 1.12g/cm3

Melting Point: -44 °C

Boiling Point: 206 °C

Flash Point: 99.2°C


In the downstream application of BDO industry chain products, γ-butyrolactone (GBL) is an important organic chemical raw material and fine chemical intermediate, which is widely used in petrochemical, pharmaceutical, dye, pesticide and fine chemical fields, and is often used in the manufacture of α-pyrrolidone, NMP, polyvinylpyrrolidone, α-acetyl-γ-butyrolactone, etc.

(1) N-methylpyrrolidone (NMP) is obtained by condensation of γ-butyrolactone and methylamine. As a high-efficiency selective solvent, this product is mainly used for the extraction of acetylene, butadiene, isoprene, and aromatic hydrocarbons from lubricating oil fractions to improve the quality of lubricating oil, especially as an environmentally friendly non-toxic solvent and the electrolyte of lithium batteries is in demand very rapidly; as a resin processing solvent for the manufacture of a variety of vinyl coatings; As a polymerization reaction solvent, it is used to manufacture polyimide heat-resistant resins, polyamides, polyphenylene ethers, etc.; In addition, it can also synthesize fine chemicals such as pharmaceuticals, pigments, fragrances and cleaning agents. 

(2) CPA is an important fatty amine containing ternary rings, mainly used in medicine, pesticides, fine chemical synthesis, etc., especially in medicine, mainly synthesized ciprofloxacin, anthracloxacin, sparfloxacin, ciprofluridic acid, etc.


(3) 2-pyrrolidone-5-carboxylic acid is obtained by esterification, ammoniation, cyclization and deamination by heating under reduced pressure based on -carboxylic acid and γ-butyrolactone. The product has three optical isomers, mainly in the form of esters and salts, widely used in daily chemicals, papermaking, leather, textiles, medicine and food and other fields, there is no domestic production equipment, so the application is very limited.

Storage and transportation methods

Store in a cool, ventilated warehouse. Keep away from fire and heat sources. It should be stored separately from oxidants, acids, alkalis, and edible chemicals, and should not be mixed. Equipped with the corresponding variety and quantity of fire-fighting equipment. The storage area should be equipped with emergency response equipment for spills and suitable containment materials.

Dangerous characteristics: flammable in case of open flame and high heat. Harmful combustion products: carbon monoxide, carbon dioxide. 

Fire extinguishing method: Firefighters must wear gas masks and full-body firefighting suits to extinguish the fire in the upwind direction. Move containers from the fire to an open area as much as possible. Water sprays keep the fire container cool until the extinguishing is complete. Containers in the middle of a fire must be evacuated immediately if they have changed color or if they are making noise from the safety pressure relief device. The escaping liquid is sprayed with water, diluted into a non-flammable mixture, and misted water is used to protect firefighters.

Fire extinguishing agents: water, mist water, anti-solvent foam, dry powder, carbon dioxide, sand.


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