福尔馬林是甲醛的37%以上的水溶液,它在醫藥上的用途很廣泛。福爾馬林本是无色清明的液體,但是在長久存放尤其在冬天時就會產生許多白色絮狀物,沉集在藥瓶的底部,往往會叫人誤認為它已經變 Formalin is a 37% or more aqueous solution of formaldehyde, and its use in medicine is extensive. Formalin is a colorless, clear liquid, but in the long-term storage, especially in winter, it will produce a lot of white flocs, sinking in the bottom of the bottle, often mistakenly believe that it has changed