Kodak Laboratory & Research Products
398 Chapter XIV Spectroscopy iodide or 1,1`-diethyl-2,2′-cyanine iodide, -carbocyanine iodide, and -dicarbocyanine iodide (a few milligrams of each is sufficient), (Gallard-Schlesinger Chemical Mfg. Corp., 1001 Franklin St., Garden City, NY, and K & K Laboratories, Inc., 121 Express St., Plain-view, NY 11803, are possible but expensive suppliers of an entire series of dyes. Aldrich Chemical