مصادر الكيمياء موقع لتعليم الكيمياء بصورة مبسطة
A presumptive test for blood in which a small amount of acetone (propenal) is added to the bloodstain, followed by a drop of hydrochloric acid. Haemoglobin produces derivatives such as haematin and haemin, forming small characteristic crystals that can be identified under a microscope.