O-Tolidine Presumptive Blood Test Kit
Many investigators use O-Tolidine as a presuptive test after the Phenolphthalein Presumptive Blood Test. A positive presumptive result yields a blue color. Packaged in a plastic box with all the necessary premixed chemicals and supplies to conduct a O-Tolidine Blood Test. The premixed chemicals are packaged in plastic dropper bottles. A known blood standard is included to monitor the results.
Arrowhead Forensics