UNSPSC 51171521: Calcarea silicata

This classification denotes an industrial aid, a preparation that US FDA regulates as an active ingredient or moiety under Unique Ingredient Identifier S4255P4G5M. European Medicines Agency schedules Calcium silicate in its eXtended EudraVigilance Medicinal Product Dictionary or XEVMPD under Index SUB12473MIG. Calcium silicate generally arises in the molecular formula CA.H2O3SI. The term 'calcium silicate' is a United States Homeopathic Pharmacopoeia Name designation. SMILES: [Ca].[Ca].[Si](O)(O)(O)O.

UNSPSC 51171521 Calcarea silicata is a Commodity code that does not align with the recent state and local contracting activity tagged under it. The single opportunity on record — Collin County Community Supervision and Corrections Department's RFP 2026-327 for offender specimen collection and drug testing services — concerns laboratory testing and compliance services for criminal justice supervision, which falls outside the scope of calcarea silicata (calcium silicate compounds used in construction, refractory, and industrial applications). The mismatch suggests either a classification error in the source data or a narrow, specialized application of the code that does not reflect typical procurement patterns. No recent opportunities support a market profile for calcarea silicata under this code.

The single tagged opportunity provides limited signal for code-level activity. Collin County, a Texas county government, issued RFP 2026-327 with proposals due July 23, 2026, for drug testing services with an estimated contract value of $600,000 and a two-year term with up to three optional one-year renewals. However, this solicitation plainly does not represent procurement of calcarea silicata or related materials. Business development professionals should verify code classification before pursuing opportunities listed under this Commodity code, as the current record does not demonstrate active state and local demand for calcium silicate products.