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 covering laboratory reagents and testing materials that state and local governments purchase for bacteriological, chemical, and analytical laboratory operations. Recent opportunities show state health departments and county laboratories procuring complement reagents alongside water-testing kits, chromatography supplies, and associated analytical consumables for drinking water quality assurance, forensic analysis, and public health surveillance. The Texas Health and Human Services Commission, on behalf of the Department of State Health Services, is requesting bids for COLILERT reagents and water bottles for bacteriological water sample testing under solicitation HHS0017459, with responses due July 8, 2026, on a standing-order requirements-contract basis (quarterly delivery across eight counties) with historical annual spend guidance of $70,050 to $90,000. The issuing-body mix is dominated by state health and environmental agencies, with some county-level laboratory operations also visible in the recent activity. Geographic spread includes Texas and the broader Southeast, though the recent-opportunities block does not support broader regional characterization beyond these states.

The code shows limited recent activity specifically tagged to complement reagents themselves; the COLILERT opportunity represents the clearest match, with the Texas HHSC purchasing IDEXX-manufactured reagent products (Colilert, Colilert-18, and associated vessels) for coliforms and E. coli detection in drinking water samples processed through the South Texas Laboratory in Harlingen. Most other recent opportunities in the dataset target analytical equipment, spectrometers, microscopy systems, and research instrumentation—distinctly different from commodity-level reagent procurement. If the code's scope is intended to capture only proprietary complement reagents in the immunological or serological sense, recent state and local opportunities show minimal activity; most laboratory procurement under tangentially related codes appears to focus on equipment and specialized analytical supplies rather than complement-based reagent systems. Business development professionals pursuing this code should monitor state and local health laboratory RFQs and standing-order renewal cycles, where reagent procurement for water quality and diagnostic testing occurs on recurring, high-volume schedules.