UNSPSC 41131720: Sulfhemoglobin assay

In this classification a sulfhemoglobin assay is a device consisting of the reagents, calibrators, controls, and instrumentation used to determine the sulfhemoglobin (a compound of sulfur and hemoglobin) content of human blood as an aid in the diagnosis of sulfhemoglobinemia (presence of sulfhemoglobin in the blood due to drug administration or exposure to a poison). This measurement may be made using methods such as spectroscopy, colorimetry, spectrophotometry, or gasometry US FDA regulates Sulfhemoglobin assay under 21 CFR 864.7490 and under FDA product code GKA.

UNSPSC 41131720 Sulfhemoglobin assay is a Commodity-tier code that does not reflect the work state and local governments are actually soliciting under this classification. Recent state and local opportunities tagged with this code predominantly involve drug testing, employment physicals, breath alcohol testing, and forensic laboratory supplies—none of which align with sulfhemoglobin assay methodology. The one exception is a sole source procurement by the State of Oregon for clozapine assay kits from Saladax Biomedical, which involves psychiatric drug-level monitoring rather than sulfhemoglobin detection. The mismatch between the code's nominal scope and the actual procurements suggests either systematic miscoding by issuing bodies or a commodity taxonomy that does not serve the clinical laboratory testing market effectively as state and local jurisdictions use it today.

The recent opportunities span county corrections departments (Collin County, Texas), county health departments (Seminole County, Florida), county courts (Benton County, Oregon), county human resources (Collier County and Clay County, Florida), state law enforcement (Nevada Department of Public Safety, State of Oregon), and city education systems (City Colleges of Chicago). Geographic activity concentrates in Florida and Texas, with secondary presence in Oregon and Nevada. Representative procurements include Collin County Community Supervision and Corrections Department's RFP for offender specimen collection and drug testing services (response due July 23, 2026, estimated contract value $600,000 over two years) and Benton County, Oregon's RFP for urinalysis testing to support the Family Treatment Court Program (response due July 6, 2026). The code shows substantial procurement velocity in pre-employment and fitness-for-duty screening, forensic drug analysis, and substance-abuse monitoring, but no recent activity that maps directly to sulfhemoglobin measurement.