UNSPSC 51182900: Combination phosphorus

This classification denotes combination drugs and preparations that contain a bio-chemically-active, non-metal element that bears atomic symbol P, atomic number 15, and atomic weight 31, known as PHOSPHORUS. Typical combination phosphorus constituents are phosphoric acid, sodium biphosphate, sodium phosphate, etc.

UNSPSC 51182900 Combination phosphorus, a Class code, spans chemical compounds used in water treatment, nutrient management, and specialized industrial processes where phosphorus control or recovery is the primary objective. State and local governments solicit under this code primarily for wastewater treatment phosphorus removal systems, as exemplified by the City of Orem's struvite precipitation equipment procurement, and for rebate contracts serving nutrition assistance programs that rely on phosphorus-containing infant formula formulations. The issuing bodies include municipal water and wastewater utilities, state health and human services departments, and county purchasing offices. The scope reflects both capital equipment (complete phosphorus control systems with tanks, pumps, instrumentation, and PLC controls) and commodity-level chemical inputs supplied on an indefinite-quantity basis.

Recent activity concentrates in Texas, Utah, Illinois, and Florida. The Texas Health and Human Services Commission issued IFB HHS0016707 on October 14, 2026, for WIC infant formula rebate contracts serving Texas, Minnesota, Iowa, and the Choctaw Nation of Oklahoma, with bids due January 11, 2027, seeking milk-based and soy-based formula in concentrated liquid, powdered, and ready-to-feed forms; the contract runs October 1, 2027 through September 30, 2032, with anticipated award February 3, 2027. The City of Orem issued an RFP (PROJECTNO230904) on September 3, 2026, for design, manufacture, and delivery of a complete phosphorus control system treating anaerobically digested sludge through struvite precipitation, with proposals due October 16, 2026 via the State of Utah's BonFire portal; the system includes process equipment, instrumentation, operator training, and one-year warranty, with delivery required within six months of award. Pasco County, Florida posted an indefinite-quantity RFQ (RFQFP261004) on June 3, 2026, for large copper sulfate crystals and liquid copper sulfate on an as-needed basis, with responses due June 26, 2026.