1. Flammable liquid. It is hygroscopic and does not corrode metal. It reacts with dibasic acid to generate polyester, reacts with nitric acid to generate nitrate, and reacts with hydrochloric acid to generate chlorohydrins. With dilute sulfuric acid at 170 ℃ heating into propionaldehyde. Oxidation with nitric acid or chromic acid generates glycolic acid, oxalic acid, acetic acid, etc. Reacts with aldehydes to form acetals. 1,2-Propanediol is dehydrated to form propylene oxide or polyethylene glycol.
2. The toxicity and irritation are very small, and no victim has been found. Rat intravenous injection and intraperitoneal injection LD50: 7000~8000mg/kg, oral LD50: 2800mg/kg. But there have also been reports of fatal insomnia and kidney problems when added to foods and beverages in high doses at one time.
3. Exist in tobacco leaves and smoke.