S 6615 (OTTO) Strontium iodide, anhydrous, 99.995% Cas no 10476-86-5 - used in a range of hand-held radiation detection instruments as well as in medical, industrial and environmental applications. S 6615 (OTTO) Strontium iodide, anhydrous, 99.995% Cas no 10476-86-5 - used in medicine as a substitute for potassium iodide. S 6615 (OTTO) Strontium iodide, anhydrous, 99.995% Cas no 10476-86-5 - used as a scintillation gamma radiation detector.