KASTLE - MEYER COLOR TEST can be used to determine if a stain is blood or not.
Kastle - Meyer color test is a presumptive blood test that is used to determine whether a stain is a blood or not. It is an easy and reliable forensic method of determining the nature of a stain in crime laboratory. The test involves using the indicator, phenophtalein to determine if hemoglobin is present in a stain. A positive result is obtained it the phenophtalein turn to a bright pink colour when it comes in contact with the stain.