Phosphoric Acids

H3PO4 30% to 85% — ACS, USP & food grade

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About Phosphoric Acids

Buy phosphoric acid (H3PO4, CAS 7664-38-2) in 75% and 85% concentrations from Alliance Chemical. Available in Food Grade (USP-NF) and Technical Grade for food processing, metal treatment, and industrial pH control.

Products In This Collection

This collection includes phosphoric acid 85% Food Grade (USP-NF, heavy metals ≤0.2 ppm, arsenic ≤0.01 ppm), phosphoric acid 85% Technical Grade (iron max 2 ppm), phosphoric acid 75% USP Food Grade, and phosphoric acid 75% Technical Grade. The 85% concentration has a specific gravity of 1.66–1.70.

Common Applications

Phosphoric acid 85% Food Grade is used as an acidulant in soft drinks and beverages, a pH control agent in food processing, a CIP acid for brewery and dairy sanitation, and a nutrient source in fermentation. The Technical Grade serves industrial rust conversion and metal surface preparation, fertilizer production, water treatment pH adjustment, and chemical synthesis. The 75% provides a less viscous option for easier handling and pumping.

Why Buy From Alliance Chemical

All phosphoric acid products include Safety Data Sheets (SDS) and lot-specific Certificates of Analysis (COA). Food Grade products meet USP-NF specifications. Alliance Chemical ships on in-stock orders with no minimum purchase requirement.

Related: See the Acids collection. Blog: “Phosphoric Acid Applications in Industry and Food Processing.”