UNSPSC 41181602: Complement reagent

In this classification, Complement reagent connotes a device that consists of complement, a naturally occurring serum protein from any warm-blooded animal such as guinea pigs, that may be included as a component part of serological test kits used in the diagnosis of disease. US FDA regulates Complement reagent under 21 CFR 866.4100 and under FDA product code KTQ.

UNSPSC 41181602 Complement reagent is a Commodity code that describes laboratory chemical reagents and consumable supplies used in diagnostic testing, water quality analysis, and scientific research applications. State and local governments procure complement reagents primarily through higher education institutions, public health departments, and environmental agencies conducting bacteriological water testing, diagnostic sample processing, and materials characterization work. The code captures branded reagent kits, test cartridges, vessels, comparators, and associated consumables from manufacturers such as IDEXX, Applied Biosystems, and specialized diagnostic vendors.

Recent activity concentrates heavily at Mississippi State University and other higher education institutions, with secondary activity at state environmental and health departments. Mississippi State University has posted over 20 sole-source procurement notices since mid-June 2026, the vast majority across specialized research equipment and materials rather than complement reagents per se; however, the code shows genuine traction in water quality and diagnostic testing. The Texas Health and Human Services Commission requested bids for COLILERT reagents and Colilert-18 kits (IDEXX products) with a response deadline of July 8, 2026 and historical annual spend of $70,050 to $90,000. Escambia County, Florida requested proposals for IDEXX supplies including Colilert-18 reagent, Enterolert reagent, vessels, Quanti-trays, and QC kits with a proposal due date of August 24, 2026 and estimated annual cost near $50,000. The Illinois State Police Department of Forensic Services solicited Applied Biosystems Rapid DNA System cartridges and maintenance under an IFB with bids due September 9, 2026. Activity spans water quality testing in Texas and Florida, forensic DNA processing in Illinois, and research applications at universities; geographic spread includes Texas, Florida, Illinois, Mississippi, and Oregon, with Mississippi State University as the dominant repeat buyer across research-grade materials and equipment rather than routine diagnostic reagents. The code shows moderate recent activity but mismatch between the reagent commodity name and actual procurement focus, which emphasizes specialized laboratory equipment and integrated testing systems over standalone complement reagents.