1. Stable under normal temperature and pressure.
Incompatible materials: alkali, oxidizing agent, reducing agent.
2. Low toxicity. It has a stimulating effect on the skin and mucous membranes, but it is not as serious as oxalic acid. The oral LD50 for mice is 1.54g/kg. Special protection is generally not needed when producing malonic acid, but cyanoacetic acid and sodium cyanide are both potent poisons, so you must be especially careful when handling compounds containing cyano groups, wear anti-virus equipment, and develop corresponding safety measures.
3. Exist in flue-cured tobacco leaves, burley tobacco leaves and mainstream smoke.
4. It can be sublimated in a vacuum.
