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Phosphoric Acid 30% - The Ultimate Rust Remover Solution
Category : Acids
$9.57
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Commercial Fulfillment Snapshot
Buy Phosphoric Acid 30% - The Ultimate Rust Remover Solution 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
- Metal fabrication shops
- Automotive restoration services
- Marine maintenance companies
- Water treatment facilities
- Industrial cleaning contractors
Purity / Grade Guide
- Industrial & commercial applications
- Verified purity, COA included
- 29-31% assay concentration
- Ready-to-use rust removal strength
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
- Complete SDS with every order
- Certificate of Analysis included
- DOT compliant shipping labels
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.
Documents: SDS and TDS available, lot-specific COA available on request.
Product Overview
Phosphoric Acid 30% is a high-purity, clear orthophosphoric acid solution formulated for industrial metal treatment and rust removal. This material (CAS 7664-38-2) maintains a strict assay of 29–31% w/w, ensuring consistent etching rates and pH control in manufacturing environments. With a density of 1.07 g/mL and low specific gravity variance (1.12–1.14), it is optimized for precise dosing in metering systems.
As a potent rust converter and scale remover, this 30% solution effectively prepares steel surfaces by converting iron oxide into a stable protective phosphate layer, significantly enhancing primer and coating adhesion. The manufacturing process ensures minimal impurity loads, with strict limits on chlorides, sulfates, and heavy metals, preventing contamination in sensitive downstream applications. Also known as Orthophosphoric Acid, this solution is water-soluble with a viscosity of 1.5 cP, allowing for excellent surface wetting on corroded substrates.
Key Properties
- Chemical Name: Phosphoric Acid 30% (Orthophosphoric Acid)
- CAS Number: 7664-38-2
- Appearance: Clear, colorless liquid
- Formula: H₃PO₄
- Specific Gravity (20°C): 1.12 – 1.14
- Chloride (Cl⁻): Max 50 ppm
- Sulfate (SO₄²⁻): Max 100 ppm
- Iron (Fe): Max 1 ppm
- Heavy Metals (as Pb): Max 0.5 ppm
- Solubility: Completely soluble in water
Common Applications
- Rust Removal & Metal Treatment: Primary agent for dissolving rust (iron oxide) and etching metal surfaces prior to painting or powder coating. Creates a phosphate conversion coating that improves corrosion resistance.
- pH Adjustment: Used in industrial water treatment facilities to lower pH levels and control alkalinity, stabilizing process water chemistry.
- Laboratory & Research: Utilized as a reagent in chemical analysis and formulation development due to its high purity and low heavy metal content.
- Industrial Cleaning: Effective ingredient in acid cleaners for removing mineral deposits, scale, and hard water buildup from industrial equipment.
- Fertilizer Manufacturing: Acts as a phosphorus source in the production of specialized liquid fertilizers for agricultural applications.
Safety & Handling
Classification: Corrosive (Class 8). Causes severe skin burns and eye damage. May be corrosive to metals.
Handle with appropriate Personal Protective Equipment (PPE), including chemical-resistant gloves, splash goggles, and face shields. Ensure adequate ventilation to avoid inhaling mists. Store in high-density polyethylene (HDPE) or glass containers, separated from strong alkalis and oxidizing agents. In case of spill, neutralize with soda ash or lime before disposal in accordance with local regulations.
Shipping Information: UN 1805, Phosphoric Acid Solution, Class 8, PG III.
Related Products
| Property | Value |
|---|---|
| Molecular Weight | 98 g/mol |
| Formula | H3PO4 |
| Assay | 30% |
| Grade | Technical |
| Flash Point | 200 |
| Form | Liquid |
| Solubility | High water solubility, miscible with polar organic solvents, complete dissolution |
| Appearance | Clear colorless liquid, slightly viscous fluid |
| Melting Point | 42 °C |
| Boiling Point | 158 °C |
| Specific Gravity | 1.18 |
| Industry | Industrial, Environmental, Research |
Frequently Asked Questions About Phosphoric Acid 30% - The Ultimate Rust Remover Solution
What is Phosphoric Acid 30% - The Ultimate Rust Remover Solution and what is its chemical formula?
Phosphoric Acid 30% - The Ultimate Rust Remover Solution 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 30% - The Ultimate Rust Remover Solution in Technical grade for laboratory, industrial, and commercial applications.
What are the physical properties of Phosphoric Acid 30% - The Ultimate Rust Remover Solution?
According to the NIOSH Pocket Guide to Chemical Hazards, Phosphoric Acid 30% - The Ultimate Rust Remover Solution is supplied as a clear colorless liquid, slightly viscous fluid. It has a melting point of 42°C, a boiling point of 158°C, a flash point of 200. The specific gravity is 1.18 relative to water. Solubility: High water solubility, miscible with polar organic solvents, complete dissolution.
What grade and purity of Phosphoric Acid 30% - The Ultimate Rust Remover Solution does Alliance Chemical offer?
Alliance Chemical offers Phosphoric Acid 30% - The Ultimate Rust Remover Solution in Technical grade with a purity assay of 30%. 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 30% - The Ultimate Rust Remover Solution?
Phosphoric Acid 30% - The Ultimate Rust Remover Solution serves a wide range of sectors, including Industrial, Environmental, and Research.Alliance Chemical provides the documentation and quality certifications required for use in regulated environments.
What PPE is required when handling Phosphoric Acid 30% - The Ultimate Rust Remover Solution?
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 30% - The Ultimate Rust Remover Solution?
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 30% - The Ultimate Rust Remover Solution?
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 30% - The Ultimate Rust Remover Solution?
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 30% - The Ultimate Rust Remover Solution 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 30% - The Ultimate Rust Remover Solution?
Yes. Alliance Chemical provides a Safety Data Sheet (SDS) and Certificate of Analysis (COA) for every lot of Phosphoric Acid 30% - The Ultimate Rust Remover Solution. 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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