text: <unk>  is a colorless liquid with a pungent odor used to sterilize medical and dental equipment. It is also used for industrial water treatment and as a chemical preservative. However, it is toxic, causing severe eye, nose, throat and lung irritation, along with headaches, drowsiness and dizziness.<unk>  is an oily liquid at room temperature (density 1.06 g/mL), and miscible with water, alcohol, and benzene. It is used as a tissue fixative in electron microscopy. It is employed as an embalming fluid, is a component of leather tanning solutions, and occurs as an intermediate in the production of certain industrial chemicals.<unk>  is frequently used in biochemistry applications as an amine-reactive homobifunctional crosslinker.  The oligomeric state of proteins can be examined through this application.
  Monomeric<unk>  can polymerize by aldol condensation reaction yielding alpha,beta-unsaturated poly-glutaraldehyde. This reaction usually occurs at alkaline pH values.
option_0: Glutaraldehyde
option_1: Ethacridine lactate
option_2: Codoxime
option_3: Thiocarboxime
option_4: Methylene blue
option_5: Paraformaldehyde
option_6: Fomepizole
option_7: Acetarsol