Auramine O CI is a fluorescent dye used in histology and pathology laboratories as a stain for acid fast bacteria. It is a yellowish-green powder with a molecular weight of 343.35 g/mol and a CAS number of 60-09-3. This product is used to identify and differentiate organisms such as Mycobacterium tuberculosis and other mycobacteria. It is also used in the diagnosis of various infections such as leprosy, brucellosis and tuberculosis. Auramine O CI is a reliable and cost effective solution for medical professionals.