Tight Chinese Supply Pushes US Phosphorus Acid Prices Up 6.74%

US phosphorus acid values firmed through June, supported by supply-tightness and seasonal agricultural procurement lifting import bids. Early June, Chinese producers faced environmental inspections and higher operating costs, tightening spot availability and prompting stronger export offers. Late June, with Gulf Coast inventories below typical seasonal levels and distributors prioritising replenishment before the Midwest herbicide season, the market maintained an upward trajectory and discouraged delays. The agrochemical sector remained the primary demand engine, with glyphosate and other herbicide formulators increasing procurement ahead of field applications. This sustained buying supported a roughly six-to-seven percent month-on-month increase. In contrast, construction-related consumption softened slightly and had limited effect on overall phosphorus chemical demand, while plastics and polymer-additives users maintained moderate consumption for phosphite-based stabilisers. Chinese yuan depreciation marginally raised landed import costs, adding urgency among distributors. The phosphorus acid outlook for July–December 2026 is mixed, with potential for modest declines or gains, depending on Asian export availability and Gulf Coast inventories.