Basic Yellow 40 (2g/L in ethanol) is a named product in the Lab Forensics fingerprint range. For a laboratory sourcing this reagent, the first question is whether the exact supplied form and specification match its approved material requirement. The product name alone does not tell you whether a particular method is appropriate for an exhibit or a complete casework sequence.
Dstl’s 2020 Fingermark Visualisation Newsletter describes a specific evaluation in which superglue fuming/Basic Yellow 40 was one of the routes compared for fingermark visualisation on fired cartridge casings. The newsletter also puts the work in its context and cautions that evaluations and validation matter. A single study or example is not a universal recommendation for every surface or laboratory.
What belongs on the order check
Compare the product identity, stated composition or form, grade, pack quantity and lot documentation with your approved materials list. Ask for the current safety data sheet and relevant technical information, and retain the supplied lot details in your laboratory’s records. Any replacement or change in source should go through the lab’s normal approval and verification route.
Keep purchasing information and method decisions distinct. The Fingermark Visualisation Manual is practitioner guidance; the local validated procedure determines how an approved product is used.
Review the Basic Yellow 40 (2g/L in ethanol) listing. Browse Online Reagents for its wider laboratory chemical catalogue. Lab Forensics is backed by PMA’s long-standing manufacturing expertise; learn about PMA and its more-than-50-year history in chemical manufacturing.
Sources: Dstl Fingermark Visualisation Newsletter, July 2020; Fingermark Visualisation Manual.