Arkray PPD Mountex, specifically Tuberculin PPD IP, is a purified protein derivative solution used for the Mantoux test, a skin test to detect sensitization to Mycobacterium tuberculosis, the bacteria that causes tuberculosis. It is a highly purified and calibrated solution, available in various tuberculin unit strengths, and is ready-to-use for intradermal administration. The solution is stabilized with Tween 80 to prevent absorption to glass surfaces and is packaged in amber-colored glass vials to protect it from light