Basic Yellow 40 can be used after glue fuming on surfaces such as cans, leather and plastics. A Forensic Light Source or UV lamp can be used to examine the evidence. Basic Yellow 40 fluoresces well between 365 nm and 485 nm. Mix about 2 grams in a liter of reagent alcohol. Basic Yellow 40 is the "Y" in the special solution known as RAY. The other parts are solutions of Rhodamine 6G and Ardrox. View our Technical Note for more specific information on mixing and using this product.

Shelf life of dry powder: indefinite as long as it is dry. Store in a cool, dark place. Shelf life of mixed solution: approximately 6 months. While reports indicate that the solution will still work after 6 months, the results may not be as good as with fresh solution. Store the mixed solution in a dark bottle in a fume hood or flammable liquids cabinet. Working solution should be stored in a dark glass jar with a tight lid and has a shelf-life of approximately 6 months. Unmixed Basic Yellow 40 powder has an indefinite shelf-life.