. What is formalin

Best Answer

Explanation:

Formalin  is a 37%  aqueous solution of formaldehyde (HCHO) , an aldehyde,which is widely 

used as disinfectant and preservative for biological specimens like cadavers ,preserved for study and research purposes.

It is also used as a fixative for histological specimens (tissue segment which is  observed and studied under a microscope) . 

Final Answer:

Thus, it can be concluded that formalin is basically a solution comprising around 37% HCHO and 63% H₂O.