Bloodstain is commonly found in crime scene on clothes, floor, chair, table and weapon. The perpetrators will try to remove bloodstain using chemical substance one of them is sodium hypochlorite. The goal of this research is to identify a hemoglobin crystals in a bloodstain on object glasses and fabrics exposed to sodium hypochlorite with concentration of 5,25% and 0,15% using Takayama test and…