Dark mode
Ask a question
Commercial Fulfillment Snapshot
Buy Phosphoric Acid 75% USP Food Grade with faster decisions and fewer back-and-forth emails.
Ships from Taylor, Texas. In-stock orders placed before 1:00 PM CT (Mon-Thu) and before 12:00 PM CT (Fri) typically ship same business day. Order online 24/7.
Who Buys This
- Food processing companies
- Beverage manufacturers
- Pharmaceutical formulators
- Agricultural nutrient suppliers
- QA/QC laboratories
Purity / Grade Guide
- USP Food Grade quality
- Food processing applications
- Pharmaceutical formulations
- Regulated industry compliance
Pack Sizes
- 1 Quart: lab & small jobs
- 1 Gallon: shop & maintenance
- 5 Gallon: production & regular use
- 15 Gallon: mid-volume operations
- 55 Gallon: bulk drum
- 275 Gallon: high-volume tote
- 330 Gallon: max-volume tote
SDS / COA / TDS
- UN 1805 Class 8 packaging
- Certificate of Analysis included
- Safety Data Sheet provided
- USP-NF compliance documentation
Small Packs: UPS Ground nationwide for pints, quarts, and gallons.
LTL / FTL: ABF, SEFL, Saia, XPO, and partner carriers for pails, drums, totes, and full truckloads.
Support: Email or call for freight options, hazardous-material routing, and lead-time confirmation.
Product Overview
Phosphoric Acid 75% USP Food Grade is a high-purity, colorless, and odorless liquid solution commonly known as Orthophosphoric Acid (H3PO4). Formulated at a 75% concentration, this weak acid offers precise acidity management for demanding industrial and food processing applications. It strictly meets USP-NF monograph specifications, ensuring low impurity levels suitable for use as an acidulant, pH adjuster, and sequestrant in food and beverage production.
Beyond food science, Phosphoric Acid 75% is a versatile chemical intermediate used in metal treatment, agriculture, and chemical manufacturing. It serves as a highly effective rust converter and metal etching agent in industrial settings. Its miscibility with water and consistent specific gravity make it a reliable choice for engineers and purchasing agents requiring a stable source of acidity for hydroponics, cleaning formulations, and buffering systems.
Key Properties
- CAS Number: 7664-38-2
- Chemical Formula: H3PO4
- Synonyms: Orthophosphoric Acid, White Phosphoric Acid
- Grade: USP Food Grade
- Concentration: 75%
- Appearance: Clear, colorless liquid
- Odor: Odorless
- Specific Gravity: 1.57–1.59 (at 25°C)
- Solubility: Miscible in water
- Boiling Point: 158 °C
Common Applications
- Food & Beverage: Utilized as an acidulant in soft drinks (colas) to provide tanginess, and as a pH adjuster in jams, jellies, and cheese production.
- Brewing & Fermentation: Used by brewers for acidification of mashes and washing yeast to ensure optimal pH levels during fermentation.
- Metal Treatment: Functions as a rust converter, transforming iron oxide (rust) into ferric phosphate, and prepares metal surfaces for coating or painting.
- Agriculture: Acts as a concentrated source of phosphorus in hydroponic solutions and liquid fertilizers to support root development.
- pH Control: A buffering agent used to neutralize alkaline solutions in wastewater treatment and chemical processing.
Safety Precautions
Phosphoric Acid is corrosive and must be handled with appropriate Personal Protective Equipment (PPE), including chemical-resistant gloves, goggles, and face shields. Store in a cool, dry, well-ventilated area away from incompatible materials such as strong bases and active metals. Use high-density polyethylene (HDPE) or 316 stainless steel for storage.
In the event of skin or eye contact, rinse immediately with copious amounts of water for at least 15 minutes. Refer to the Safety Data Sheet (SDS) for detailed handling, disposal, and emergency procedures. This product is regulated as UN 1805, Phosphoric acid, solution, Class 8, PG III.
Benefits
USP Food Grade Purity – Meets strict standards for use in food, beverage, and pharmaceutical processing.
Versatile Acidulant – Provides consistent pH control for manufacturing, brewing, and hydroponic systems.
Effective Rust Removal – Converts rust and prepares steel surfaces for painting without mechanical sanding.
Bulk Availability – Stocked in sizes ranging from 1 Quart to 330 Gallon totes to support operations of all scales.
Related Products
| Property | Value |
|---|---|
| Molecular Weight | 98 g/mol |
| Formula | H3PO4 |
| Assay | 75% |
| Grade | USP Food Grade |
| Flash Point | Non-flammable |
| Form | Liquid |
| Solubility | Completely miscible with water, excellent polar solvent compatibility |
| Appearance | Clear, pale yellow liquid, translucent viscous |
| Melting Point | 42 °C |
| Boiling Point | 158 °C |
| Industry | Food, Beverage, Dairy, Agriculture |
Frequently Asked Questions About Phosphoric Acid 75% USP Food Grade
What is Phosphoric Acid 75% USP Food Grade and what is its chemical formula?
Phosphoric Acid 75% USP Food Grade is a chemical compound with the molecular formula H3PO4, registered under CAS Number 7664-38-2 by the Chemical Abstracts Service (PubChem), with a molecular weight of 98 g/mol. Alliance Chemical supplies Phosphoric Acid 75% USP Food Grade in USP Food Grade grade for laboratory, industrial, and commercial applications.
What are the physical properties of Phosphoric Acid 75% USP Food Grade?
According to the NIOSH Pocket Guide to Chemical Hazards, Phosphoric Acid 75% USP Food Grade is supplied as a clear, pale yellow liquid, translucent viscous. It has a melting point of 42°C, a boiling point of 158°C, a flash point of Non-flammable. Solubility: Completely miscible with water, excellent polar solvent compatibility.
What grade and purity of Phosphoric Acid 75% USP Food Grade does Alliance Chemical offer?
Alliance Chemical offers Phosphoric Acid 75% USP Food Grade in USP Food Grade grade with a purity assay of 75%. Every lot ships with a Certificate of Analysis (COA) and Safety Data Sheet (SDS) prepared in accordance with OSHA Hazard Communication Standard 29 CFR 1910.1200 and GHS Revision 7. Download SDS.
What are common industrial applications of Phosphoric Acid 75% USP Food Grade?
Phosphoric Acid 75% USP Food Grade serves a wide range of sectors, including Food, Beverage, Dairy, and Agriculture.Alliance Chemical provides the documentation and quality certifications required for use in regulated environments.
What PPE is required when handling Phosphoric Acid 75% USP Food Grade?
OSHA-mandated PPE per 29 CFR 1910.132-138:Chemical-resistant gloves (20+ mil neoprene or PVC), full face shield over safety goggles (ANSI Z87.1), acid-resistant apron or chemical suit, closed-toe chemical-resistant footwear. Respiratory protection (organic vapor cartridge) required in areas exceeding PEL/TLV per 29 CFR 1910.134. Emergency eyewash station and safety shower must be accessible within 10 seconds per ANSI Z358.1. Consult the SDS available from Alliance Chemical for complete PPE requirements.
What are the storage requirements for Phosphoric Acid 75% USP Food Grade?
Store perOSHA 29 CFR 1910.106: Approved flammable storage cabinet, maximum 60 gallons per cabinet, grounding/bonding required. Temperature range:15-25°C. Segregate from:bases, reactive metals, organic materials. Maximum storage:2-3 years unopened.
What is the emergency spill procedure for Phosphoric Acid 75% USP Food Grade?
Emergency response per EPA SPCC (40 CFR 112) and OSHA 29 CFR 1910.120: (1) Alert personnel, evacuate area to 100 feet. (2) Eliminate ignition sources if flammable. (3) Don PPE per SDS Section 8. (4) Stop leak if safe; use emergency shutoffs. (5) Contain with non-combustible absorbent materials, dike with sand/earth. (6)Carefully neutralize with sodium bicarbonate (5-10% solution), monitor exothermic reaction. (7) Collect in DOT-approved containers, label as hazardous waste. Check 40 CFR 302.4 for Reportable Quantity. Emergency: Chemtel 1-800-255-3924 (24/7). Non-emergency: Alliance Chemical 512-365-6838.
What is the DOT shipping classification for Phosphoric Acid 75% USP Food Grade?
DOT Classification per 49 CFR 172.101:See SDS Section 14 for specific UN number, Hazard Class8 (Corrosive), Packing GroupII/III. Requires: Hazmat shipping papers (49 CFR 172.200), UN specification packaging (49 CFR 173), hazmat labels (172.400). Alliance Chemical ships all orders in DOT-compliant packaging with proper documentation.
How must Phosphoric Acid 75% USP Food Grade waste be disposed?
Disposal per RCRA (40 CFR 261-265):Characteristic waste D002 (Corrosive, pH ≤2 or ≥12.5). Generator requirements: EPA ID number required if >100 kg/month (40 CFR 262.12). Use EPA-permitted Treatment, Storage, Disposal Facility (TSDF). Never discharge to sewer without POTW written approval (40 CFR 403). Container disposal: Triple rinse (40 CFR 261.7), offer for reconditioning/recycling. State regulations may be more stringent — check with your local environmental agency. Consult the Alliance Chemical SDS for product-specific disposal guidance.
Does Alliance Chemical provide an SDS and COA for Phosphoric Acid 75% USP Food Grade?
Yes. Alliance Chemical provides a Safety Data Sheet (SDS) and Certificate of Analysis (COA) for every lot of Phosphoric Acid 75% USP Food Grade. The SDS is prepared in accordance with OSHA Hazard Communication Standard 29 CFR 1910.1200 and the Globally Harmonized System (GHS) Revision 7, covering all 16 required sections including hazard identification, first aid measures, firefighting measures, handling and storage, exposure controls, and regulatory information. The SDS is available for download directly from this product page. COAs are available upon request by contacting Alliance Chemical at 512-365-6838.
Learn More About This Product
Understanding Metal Pickling: Acid Selection Fundamentals
Hydrochloric Acid vs Sulfuric Acid for Metal Pickling:...
Why Proper Stainless Steel Passivation Matters
Understanding the chemistry, process, and regulatory requirements that...
BS1-GBU-WJ4
$18.00
Unit price
Compare Products
| Price |
|---|
| SKU |
| Rating |
| Discount |
| Vendor |
| Tags |
| Weight |
| Stock |
| Short Description |