UNSPSC 41181608: Radial immunodiffusion plate

In this classification, Radial immunodiffusion plate connotes a device used to that consists of a plastic plate to which agar gel containing antiserum is added. In radial immunodiffusion, antigens migrate through gel which originally contains specific antibodies. As the reagents come in contact with each other, they combine to form a precipitate that is trapped in the gel matrix and immobilized. US FDA regulates Radial immunodiffusion plate under 21 CFR 866.4800 and under FDA product code JZQ.

UNSPSC 41181608 Radial immunodiffusion plate is a Commodity code that shows little recent activity aligned with its nominal scope. The recent state and local opportunities tagged under this code predominantly involve specialized research and laboratory equipment — microscopy systems, induction furnaces, cold spray additive manufacturing platforms, acoustic receivers, spectral analysis instruments, and X-ray diffractometers — rather than radial immunodiffusion plates or related consumable medical diagnostics. The issuing bodies are research universities (Mississippi State University, University of Wisconsin-Madison, University of Southern Mississippi, Midwestern State University, University of Mississippi, Texas State University, Texas A&M University System) and a small number of state agencies (Mississippi Department of Agriculture and Commerce, Illinois Environmental Protection Agency, Oregon Department of Consumer and Business Services, Texas Health and Human Services Commission). Mississippi State University dominates the recent posting volume, accounting for the majority of sole-source procurement notices between June and October 2026.

The geographic concentration centers on Mississippi institutions, followed by Wisconsin, Illinois, and Texas universities. Representative recent solicitations include Mississippi State University's sole-source notice (9250-27-R-RFIN-00025, posted October 9, 2026, objections due October 23) for a Redwire Stalker Block 40 UAV fixed configuration estimated at $2.086 million; University of Southern Mississippi's IFB (9280-27-R-IFBD-00015, posted October 5, 2026, due October 22) for a Dynamic Mechanical Analyzer with detailed material-property measurement specifications; and Midwestern State University's RFP (735-2026-4429, posted August 18, 2026, due September 15) for an LM10 Microfluidizer Processor with mandatory on-site installation and training. The code's recent activity is dominated by sole-source determinations for capital equipment rather than consumable medical or diagnostic products, indicating a mismatch between the code's nominal immunodiagnostics scope and the actual procurement activity tagged under it. Firms targeting state and local laboratory and research budgets should verify equipment category alignment when pursuing opportunities under this code.