This 500mL bottle of Acid Alcohol (3%) is a specialized laboratory reagent distributed by Unilab Kenya Limited. Composed of a 3% v/v solution of Hydrochloric Acid in an ethanol or reagent alcohol base, it is primarily used as a differentiating agent in histology and microbiology. In the Ziehl-Neelsen staining method, it functions as a decolorizer to distinguish acid-fast bacteria, which retain primary stains, from non-acid-fast organisms. Additionally, it is used in Hematoxylin and Eosin (H&E) staining to selectively remove excess hematoxylin, ensuring crisp and clear nuclear detail in tissue sections.