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, does not map cleanly to the recent state and local opportunities tagged under it. Of the eight posted solicitations in the recent-opportunities block, only two are nominally related to phosphorus chemistry: a St. Johns River Water Management District RFP for lanthanum-modified bentonite treatment to inactivate bioavailable sediment phosphorus in Lake Jesup, Florida (RFP 42136, due April 13, 2026), and a Pasco County, Florida RFQ for large copper sulfate crystals and liquid copper sulfate on an as-needed basis (RFQFP261004, due June 26, 2026). The remaining six opportunities—two Illinois Department of Human Services durable medical equipment solicitations from Murray Developmental Center in Centralia, and four Michigan Department of Health and Human Services WIC infant formula rebate program procurements—fall outside the scope of combination phosphorus products and appear to be mislabeled within this code classification.

The code shows minimal recent relevant activity. The Lake Jesup sediment treatment project represents a specialized water-quality application with a $15 million budget funded through the Florida Department of Environmental Protection, requiring bidders to demonstrate prior experience with similar bioavailable phosphorus inactivation work on projects of ten acres or greater completed within the preceding ten years and staff expertise in lanthanum-modified bentonite application. The Pasco County copper sulfate procurement is an indefinite-quantity, as-needed supply arrangement with no specified budget, contract term, or evaluation criteria disclosed. Activity appears concentrated in Florida with a single water management district and county buyer; no repeat buyers or geographic pattern supporting sustained procurement under this code is evident from the source material.