Tracer Dye - Yellow/Green

Bright Dyes FLT Yellow/Green products are specially formulated versions of Xanthene dye. They are safe, non-toxic, biodegradable, and certified by NSF International to ANSI/NSF Standard 60 for use in drinking water.

Bright Dyes Yellow/Green products are a traditional fluorescent water tracing and leak detection material and has been used for labeling studies from the beginning of the century.  It may be detected visually, by UV light and by appropriate fluoremetric equipment. Today, it is most often used visually.

FLT Yellow/Green products been used by the military to mark downed pilots for search and rescue operations over large water bodies. Visually the dye appears yellow/green, depending on its concentration.  Under UV light, it appears as lime green.

Based on biochemical oxygen demand (BOD) studies, FLT Yellow/Green products are biodegradable with 65% of the available oxygen consumed in 7 days. The dye is resistant to absorption on most suspended matter in fresh and salt water.

However, compared to FWT Red products, FLT Yellow/Green products are significantly less resistant to degradation by sunlight and when used in fluoremetry, stands out much less clearly against background fluorescence.

As always, the suitability of these products for any specific application should be evaluated by a qualified hydrologist or other industry professional.