PY 139 – isoindoline yellow PY 139 – isoindoline yellow Manufacturer/ product code: Kremer / 24000Chemical Description: isoindolineColor: yellowColor Index: PY 139Date: from 1964 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 )