Dye Tracer Powder, Dye Type Water Tracing Dye, Color Orange, Form Powder, Container Size 1 lb, Coverage 60,400 gal (Strong Visual), 604,000 gal (Light Visual), Dissolution Time 3 to 6 min, Detectability less than 100 ppb, NSF Certified Yes, Fluorescent Yes, Application Cooling Towers, Flow Studies, Lakes, Rivers, Ponds, Leak Detection In Large Closed Loop Systems, Power Plant Piping, Sewer and Drain Connections, Standards ANSI; NSF