1. ORGANIC SYNTHETIC DYES OF A CERTAIN CHEMICAL COMPOSITION: ART.FLS / 1-FSL / 4 FLUORESCEIN SODIUM SALT CAS ?518-47-8 / FLUORESCEIN SODIUM SALT CAS ?518-47-8 -100KG. ORGANIC CHEMICAL DYE WITH THE CHEMICAL FORMULA C20O10NA BELONGING TO THE GROUP OF XANTHENE DYES BELONGING TO THE CLASS OF TRIPHENYLMETHANE DYES. THE CONTENT OF THE MAIN SUBSTANCE (DYE) IS NOT LESS THAN 90% NOT MIXED WITH INORGANIC PIGMENTS. IT HAS THE FORM OF A BROWN-ORANGE POWDER SOLUBLE IN WATER WITH THE FORMATION OF A SOLUTION THAT FLUORESCES YELLOW-GREEN UNDER THE ACTION OF LIGHT RAYS. IT IS USED IN THERMAL NETWORKS TO DETECT LEAKS. IN ANALYTICAL CHEMISTRY FLUORESCEIN IS USED AS A LUMINESCENT ACID-BASE INDICATOR.; ART.CRB / 1 ERIOCHROME BLACK BLUE SE CAS ?1058-92-0 / ERIOCHROME BLACK-BLUE SE CAS ?1058-92-0 -25KG.AZO DYE WITH A CHEMICAL FORMULA C16H9CLN2NA2O9S2. DARK BLUE POWDER SOLUBLE IN WATER. IT IS USED IN ANALYTICAL CHEMISTRY AS A COMPLEXOMETRIC INDICATOR IN MICROSCOPY FOR YOU