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, a Commodity code, does not align with the state and local contract opportunities in the source. The code nominally describes laboratory assay services for sulfhemoglobin detection, typically used in clinical chemistry and toxicology to measure abnormal hemoglobin variants related to drug exposure or methemoglobinemia. The recent opportunities solicited under this code designation, however, span drug testing supplies, forensic laboratory reagents and reference materials, urinalysis testing, occupational health screening, and clozapine assay kits—none of which directly measure or quantify sulfhemoglobin. The mismatch suggests either systematic miscoding by issuing bodies at the point of solicitation or a divergence between the code's abstract definition and how it is applied in practice.

The issuing bodies pursuing opportunities tagged with this code are primarily county criminal-justice and health-services departments (Collin County and Gwinnett County), with secondary activity from state procurement divisions (Texas Comptroller Statewide Procurement Division, State of Oregon), municipal health departments (City of Charlotte), county occupational-health programs (Bernalillo County), and academic institutions (University of Wisconsin-Madison). Recent opportunities include Collin County Community Supervision and Corrections Department's RFP for offender specimen collection and drug testing services with a $600,000 estimated value and responses due July 23, 2026; Gwinnett County's RFQ for drug testing supplies compatible with a drugs-of-abuse analyzer due October 14, 2026; and Pinellas County's ITQ for certified reference materials (drug standards) for forensic drug analysis funded through the Paul Coverdell Forensic Sciences Improvement Act Program with approximately $49,034 designated for supplies, due April 23, 2026. Geographic spread includes Texas, Georgia, Florida, Oregon, North Carolina, New Mexico, and Wisconsin. The code shows moderate recent activity concentrated in drug-testing procurement across criminal-justice and public-health contexts, but the sulfhemoglobin assay designation itself appears to be a labeling artifact rather than an accurate reflection of the goods and services actually being bought.