PV 23 – dioxazine purple PV 23 – dioxazine purple Manufacturer/ product code: Kremer / 55900Chemical Description: dioxazine (similar to PV 37)Color: violetColor Index: PV 23Date: from 1952 Reflectance Spectroscopy (350-950 nm) Reflectance Spectroscopy (200-1250 nm) Reflectance Spectroscopy (950-1700 nm) XRF Spectroscopy Raman Spectroscopy (532 nm) Raman Spectroscopy (785 nm) Raman Spectroscopy (830 nm) Raman Spectroscopy (1064 nm) FTIR Spectroscopy (non-invasive )