Fixative for pathological specimens – MCQ

Which chemical is the most commonly used as a fixative for pathological specimens?
A. Picric acid
B. Mercuric chloride
C. Ethanol
D. Formaldehyde

Correct answer : D. Formaldehyde

  • Fixation is the process by which the morphological features of tissues are preserved
  • All of the above chemicals can be used a fixatives for pathological specimens
  • But formalin (solution of formaldehyde in water) is the most commonly used fixative
  • Formaldehyde is a colourless gas at room temperature with a pungent smell

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