1. Colorless liquid with ammonia odor, this product has low toxicity. Can be miscible with water and soluble in most organic solvents such as ether and acetone. Can dissolve most organic and inorganic compounds, polar gases, natural and synthetic polymer compounds.
2. Chemical properties: It is relatively stable in neutral solutions. 50% to 70% hydrolysis occurs after 8 hours in a 4% sodium hydroxide solution. Hydrolysis gradually occurs in concentrated hydrochloric acid, producing 4-methylaminobutyric acid. Due to the reaction of carbonyl groups, ketal or thiopyrrolidone can be generated
3. In the presence of an alkaline catalyst, it reacts with olefins and undergoes alkylation reaction at the third position. N-Methylpyrrolidone is weakly alkaline and can generate hydrochloride salts. Form adducts with heavy metal salts, such as heating with nickel bromide to 150 ℃, to generate NiBr2 (C5H9ON) 3 with a melting point of 105 ℃.