1. Colorless liquid, with ammonia smell, low toxicity. 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 properties: stable in neutral solution. After 8 hours in 4% NaOH solution, 50% ~ 70% of them hydrolyzed. In concentrated hydrochloric acid, 4-methylaminobutyric acid was gradually hydrolyzed to form 4-methylaminobutyric acid. Ketal or thiopyrrolidone can be formed by carbonyl reaction
3. In the presence of alkali catalyst, alkylation occurs at the third position. N-methylpyrrolidone is weakly basic and can form hydrochloride. It forms adduct with heavy metal salt, for example, it is heated to 150 ℃ with nickel bromide to form nibr2 (c5h9on) 3 with melting point of 105 ℃.
