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Commercial Fulfillment Snapshot
Buy Phosphoric Acid 75% 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
- Water treatment facilities
- Fertilizer manufacturers
- Food processing companies
- Metal finishing shops
- Chemical synthesis operations
Purity / Grade Guide
- Industrial & lab applications
- Verified purity, COA included
- Suitable for commercial processes
- 75% concentration verified by COA range
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
- SDS
- COA
- UN 1805 Class 8 packaging
- DOT compliant labeling
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% is a clear, colorless liquid solution of Orthophosphoric Acid (H3PO4) tailored for industrial and manufacturing applications. This concentration provides a balance of acid strength and viscosity, making it easier to pump and handle in cooler environments compared to higher concentrations. It offers robust buffering capacity and controlled acidity for pH adjustment, chemical synthesis, and metal surface treatment.
The 75% solution is formulated to deliver consistent titratable acidity and low visual color, ensuring reproducible results in critical formulations. Its density and viscosity are suitable for reliable dosing in closed systems. Alliance Chemical provides this product in specific pack sizes ranging from 1 gallon to bulk totes to meet the needs of facility managers and process engineers.
Key Properties
- Chemical Formula: H3PO4
- CAS Number: 7664-38-2
- Molecular Weight: 97.99 g/mol
- Boiling Point: 158 °C
- Specific Gravity: 1.58 (at 20 °C)
- Appearance: Clear, colorless liquid
- Odor: Odorless
- pH (20 °C, 10% w/w solution): 1–2 (typical 1.5)
Common Applications
- Metal Finishing & Rust Removal: Utilized extensively in cleaning, degreasing, and etching processes. It effectively converts iron oxide (rust) into ferric phosphate, preparing metal surfaces for painting or coating (phosphatizing).
- Water Treatment (pH Control): Used to adjust pH levels in mixed-sorbent and recirculating water systems to optimize coagulation and corrosion control.
- Agriculture & Fertilizer: A key reagent in the synthesis of phosphate-based fertilizers and nutrient solutions, aiding in phosphate rock dissolution.
- Chemical Manufacturing: Serves as a reagent for esterification, phosphorylation, and dehydration reactions in industrial chemical synthesis.
Safety Precautions
Handle Phosphoric Acid 75% with appropriate PPE, including chemical-resistant gloves, splash goggles, and a face shield. This product is corrosive to metals and skin. Store in a cool, dry location in compatible containers (HDPE or glass) away from bases and oxidizers. Ensure proper ventilation to minimize vapor buildup.
Transport & Handling: Phosphoric acid solution is classified as UN 1805, Class 8, PG III. Read the Safety Data Sheet (SDS) fully before use. In case of skin or eye contact, rinse immediately with copious water and seek medical attention.
Benefits
Consistent Industrial Strength – 75% concentration ensures reliable performance for heavy-duty descaling and pH adjustment.
Versatile Utility – Suitable for a wide range of applications from wastewater treatment to metal surface prep.
Bulk Availability – Stocked in sizes from 1 quart to 330-gallon totes to support small batch and continuous process operations.
Related Products
| Property | Value |
|---|---|
| Molecular Weight | 98 g/mol |
| Formula | H3PO4 |
| Assay | 75% |
| Grade | Technical |
| Flash Point | 210 |
| Form | Liquid |
| Solubility | Complete water miscibility, dissolves in polar organic solvents |
| Appearance | Clear yellowish liquid, syrupy consistency |
| Melting Point | 42 °C |
| Boiling Point | 158 °C |
| Specific Gravity | 1.57 |
| Industry | Industrial, Environmental, Chemical Processing |
Frequently Asked Questions About Phosphoric Acid 75%
What is Phosphoric Acid 75% and what is its chemical formula?
Phosphoric Acid 75% 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% in Technical grade for laboratory, industrial, and commercial applications.
What are the physical properties of Phosphoric Acid 75%?
According to the NIOSH Pocket Guide to Chemical Hazards, Phosphoric Acid 75% is supplied as a clear yellowish liquid, syrupy consistency. It has a melting point of 42°C, a boiling point of 158°C, a flash point of 210. The specific gravity is 1.57 relative to water. Solubility: Complete water miscibility, dissolves in polar organic solvents.
What grade and purity of Phosphoric Acid 75% does Alliance Chemical offer?
Alliance Chemical offers Phosphoric Acid 75% in Technical 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%?
Phosphoric Acid 75% serves a wide range of sectors, including Industrial, Environmental, and Chemical Processing.Alliance Chemical provides the documentation and quality certifications required for use in regulated environments.
What PPE is required when handling Phosphoric Acid 75%?
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%?
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%?
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%?
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% 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%?
Yes. Alliance Chemical provides a Safety Data Sheet (SDS) and Certificate of Analysis (COA) for every lot of Phosphoric Acid 75%. 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.
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