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Commercial Fulfillment Snapshot
Buy Phosphoric Acid 75 ACS 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
- Analytical testing laboratories
- Research & development teams
- Quality control departments
- University chemistry labs
- Pharmaceutical manufacturers
Purity / Grade Guide
- ACS Grade meets reagent standards
- High purity for lab applications
- Consistent COA-verified purity range
- Low metals for analytical work
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
- SDS with every shipment
- COA showing ACS compliance
- Hazmat shipping documentation included
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% ACS Grade is a clear, colorless liquid solution of Orthophosphoric Acid (H3PO4) manufactured to exacting standards of purity. As a triprotic acid, it offers precise acidity control and functions as a reliable reagent for buffer systems, chemical synthesis, and analytical workflows. This product strictly conforms to ACS Reagent Grade specifications and USP-NF Monograph standards, ensuring minimal impurities.
With a typical assay of 75.0–76.5 wt%, this solution provides consistent performance for applications requiring rigorous quality control. It features exceptional clarity (APHA ≤ 10) and very low residue after ignition. The product is fully miscible with water and is compatible with HDPE and glass storage. It serves as a vital component in laboratory analysis, metal surface treatment, and industrial formulation.
Key Properties
- Appearance: Clear, colorless liquid
- Grade: ACS Reagent Grade
- Chemical Formula: H3PO4
- Assay: 75.0% – 76.5%
- Specific Gravity (20°C): 1.57 – 1.58
- Residue After Ignition: ≤ 0.1%
- Chloride (Cl): ≤ 0.5 ppm
- Heavy Metals (as Pb): ≤ 0.5 ppm
- Iron (Fe): ≤ 0.2 ppm
Common Applications
- Laboratory Reagent: Used as a standard reagent in titration methods, buffer preparation, and analytical sample preparation where low contaminant profiles are critical.
- pH Control & Water Treatment: employed to adjust and stabilize pH levels in industrial water treatment processes, assisting in scale control and neutralization.
- Metal Finishing: Integrated into formulations for cleaning, descaling, and electropolishing metal surfaces, acting as a rust inhibitor and surface preparation agent.
- Chemical Synthesis: serves as a raw material and catalyst in the production of phosphate salts, fertilizers, and other phosphate-based chemical compounds.
Safety Precautions
Phosphoric Acid is corrosive. Handle with appropriate Personal Protective Equipment (PPE), including chemical splash goggles, acid-resistant gloves, and a lab coat. Store in a cool, dry, well-ventilated area in corrosion-resistant containers (HDPE or glass). Keep away from strong bases and oxidizing agents.
Emergency Handling: In case 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 comprehensive hazard communication and emergency response guidelines.
Benefits
ACS Grade Purity: Meets strict American Chemical Society specifications for laboratory and analytical use.
Versatile Packaging: Available in sizes ranging from 1 Quart bottles to 330 Gallon totes to suit research or bulk production needs.
Consistent Formulation: Precise 75% concentration ensures reliable results in pH adjustment and synthesis.
Related Products
| Property | Value |
|---|---|
| Molecular Weight | 98 g/mol |
| Formula | H3PO4 |
| Assay | 75% |
| Grade | ACS Reagent Grade |
| Flash Point | Non-flammable |
| Form | Liquid |
| Solubility | High water solubility, miscible with polar solvents, excellent aqueous dispersibility |
| Appearance | Transparent, mobile liquid with water-like clarity |
| Melting Point | 42 °C |
| Boiling Point | 158 °C |
| Specific Gravity | 1.57 |
| Industry | Industrial, Chemical Research, Water Treatment, Analytical Sciences |
Frequently Asked Questions About Phosphoric Acid 75 ACS Grade
What is Phosphoric Acid 75 ACS Grade and what is its chemical formula?
Phosphoric Acid 75 ACS 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 ACS Grade in ACS Reagent Grade grade for laboratory, industrial, and commercial applications.
What are the physical properties of Phosphoric Acid 75 ACS Grade?
According to the NIOSH Pocket Guide to Chemical Hazards, Phosphoric Acid 75 ACS Grade is supplied as a transparent, mobile liquid with water-like clarity. It has a melting point of 42°C, a boiling point of 158°C, a flash point of Non-flammable. The specific gravity is 1.57 relative to water. Solubility: High water solubility, miscible with polar solvents, excellent aqueous dispersibility.
What grade and purity of Phosphoric Acid 75 ACS Grade does Alliance Chemical offer?
Alliance Chemical offers Phosphoric Acid 75 ACS Grade in ACS Reagent 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 ACS Grade?
Phosphoric Acid 75 ACS Grade serves a wide range of sectors, including Industrial, Chemical Research, Water Treatment, and Analytical Sciences.Alliance Chemical provides the documentation and quality certifications required for use in regulated environments.
What PPE is required when handling Phosphoric Acid 75 ACS 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 ACS 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 ACS 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 ACS 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 ACS 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 ACS Grade?
Yes. Alliance Chemical provides a Safety Data Sheet (SDS) and Certificate of Analysis (COA) for every lot of Phosphoric Acid 75 ACS 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.
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