UNSPSC 51171501: Calcium carbonate

This classification denotes a nutritional supplement with the molecular formula CO3.Ca, a preparation that US FDA regulates as an active ingredient or moiety under Unique Ingredient Identifier H0G9379FGK, chemically known as carbonic acid, calcium salt (1:1) but generally known as calcium carbonate, which bears US NIH Compound Identifier 10112. European Medicines Agency schedules Calcium carbonate in its eXtended EudraVigilance Medicinal Product Dictionary or XEVMPD under Index SUB13166MIG.

World Health Organization schedules calcium carbonate in its Anatomical Therapeutic Chemical (ATC) Classification. As of Q4 2014, CALCIUM CARBONATE remains the US FDA Preferred Term for this commodity. Calcium carbonate bears US NLM identifiers UMLS ID C0006681 and NCI Concept Code C332. SMILES: C(=O)([O-])[O-].[Ca+2].

UNSPSC 51171501 Calcium carbonate, a Commodity code, shows a material mismatch between its nominal scope and recent state and local solicitation activity. The one representative recent opportunity in the record—Collin County Community Supervision and Corrections Department's RFP 2026-327 for offender specimen collection and drug testing services—involves no calcium carbonate procurement. The solicitation covers staffing two testing collection sites in Plano and McKinney, operation of an Interactive Voice Response system for randomized test notifications, immunoassay screening with LC/MS/MS or GC/MS confirmation, electronic result reporting, and alternative testing methodologies including oral fluid and hair analysis. Annual testing volume is approximately 25,031 tests across five-panel and six-panel screens with ancillary work. This is a criminal justice services contract, not a chemical commodity purchase.

The code shows little relevant recent activity aligned with calcium carbonate procurement. Collin County, the sole issuing body represented in the recent-opportunities block, is a Texas county government; however, the substance of its posting—drug testing and offender supervision services—falls entirely outside the calcium carbonate category. No other state or local jurisdictions appear in the source material. The contract term runs two years from September 1, 2026, with three optional one-year renewals not to exceed five years total, with an estimated value of $600,000 and an anticipated award date of August 10, 2026. Business development professionals should treat this code as inactive for calcium carbonate sourcing in the current state and local procurement environment and investigate whether the code assignment reflects a data error or a one-time misclassification by the issuing body.