Formalin is most commonly used for which purpose?

Formalin is most commonly used for which purpose?

• A. Disinfecting
• B. Flea prevention
• C. Tissue biopsy
• D. Copy machine toner

Answer: (C)

Formalin is used as a tissue fixative in histopathology. It preserves tissue architecture by cross-linking proteins, which halts enzymatic degradation and microbial activity, keeping cells and structures intact long enough to be processed, sectioned, and stained for microscopic examination of biopsied samples. While formalin can have disinfectant properties, its primary role in practice is fixing tissue for biopsy analysis, not routine disinfection. It’s not used for flea prevention or as copier toner. The fixation process, especially when using neutral buffered formalin, helps maintain morphology and can influence downstream tests like immunohistochemistry by preserving antigens in the tissue.

Formalin is used as a tissue fixative in histopathology. It preserves tissue architecture by cross-linking proteins, which halts enzymatic degradation and microbial activity, keeping cells and structures intact long enough to be processed, sectioned, and stained for microscopic examination of biopsied samples. While formalin can have disinfectant properties, its primary role in practice is fixing tissue for biopsy analysis, not routine disinfection. It’s not used for flea prevention or as copier toner. The fixation process, especially when using neutral buffered formalin, helps maintain morphology and can influence downstream tests like immunohistochemistry by preserving antigens in the tissue.