Analytical Analytical Stains, Dyes and Indicators Stains, Dyes and Indicators 152 NAPHTHOL BLUE BLACK NAPHTHOL BLUE BLACK C22H14N6O9S2Na2 616.49 1064,48,8 1064488 48,8 106448,8 1064 48 8 NR 0.000 Indicator for iodate and bromate oxidimetry 51701 27.80 25 G Suitability for use as indicator - Pass test