--- product_id: 40824609 title: "1 Quart / 950ml 85% Food Grade Phosphoric Acid Rust Remover Clean Etch Metal" brand: "duda energy" price: "$100.80" currency: USD in_stock: true category: "Duda Energy" url: https://www.desertcart.us/products/40824609-1-quart-950ml-85-food-grade-phosphoric-acid-rust-remover store_origin: US region: United States of America --- # 950ml high-volume industrial strength 85% pure phosphoric acid concentration rust removal & metal etching power 1 Quart / 950ml 85% Food Grade Phosphoric Acid Rust Remover Clean Etch Metal **Brand:** duda energy **Price:** $100.80 **Availability:** ✅ In Stock ## Summary > 🧪 Transform rusted metal into showroom shine—don’t let corrosion steal your style! ## Quick Answers - **What is this?** 1 Quart / 950ml 85% Food Grade Phosphoric Acid Rust Remover Clean Etch Metal by duda energy - **How much does it cost?** $100.80 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/40824609-1-quart-950ml-85-food-grade-phosphoric-acid-rust-remover) ## Best For - duda energy enthusiasts ## Why This Product - Trusted duda energy brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Versatile Metal Care:** Perfect for restoring, cleaning, and protecting iron, steel, copper, and more with a rust-inhibiting barrier. - • **Safe & Controlled Use:** Food-grade quality ensures safer handling compared to harsher acids—just dilute and apply with gloves. - • **Economical & Efficient:** Concentrated formula lets you dilute to your needs—save money while achieving professional results. - • **Trusted by Pros & DIYers:** Top-rated with 4.8 stars and thousands of users who swear by its powerful yet manageable formula. - • **Industrial-Grade Strength:** 85% food-grade phosphoric acid delivers unmatched rust removal and metal etching performance. ## Overview Duda Energy’s 950ml bottle of 85% food-grade phosphoric acid is a powerhouse rust remover and metal etcher trusted by professionals and enthusiasts alike. Its concentrated formula efficiently dissolves rust and forms a protective barrier, making it ideal for restoring iron, steel, and copper surfaces. Economical and versatile, it’s perfect for industrial, automotive, and DIY metal care projects, delivering high-quality results with safer handling compared to stronger acids. ## Description Chemical Formula: H3PO4 Density: 98g/ml Phosphoric acid is often used to acidify foods and beverages such as carious colas. It provides a tangy and sour taste. We use Phosphoric acid to treat the by-product of biodiesel. after methanol extraction, using phosphoric acid allows a clean separation of the glycerin and soaps. If done correctly, it can yield 90% pure glycerin. May also be used as a rust remover/inhibitor. Dilute to a 25-50% concentration with water and soak rusted metal parts. Over time, rust will remove and the phosphoric acid reacts with the metal to create a rust inhibiting barrier on the metal. Be sure to use gloves! Great for cleaning residue from metals. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B06Y1B82TG | | Best Sellers Rank | #37,429 in Automotive ( See Top 100 in Automotive ) #131 in Care Corrosion & Rust Inhibitors #1,430 in Oils & Fluids | | Brand Name | Duda Energy | | Container Type | Bottle | | Contains Liquid Contents? | Yes | | Customer Reviews | 4.8 4.8 out of 5 stars (210) | | Item Form | Liquid | | Item Volume | 950 Milliliters | | Item Weight | 3.6 Pounds | | Manufacturer | Duda Energy | | Model Number | Fgphos-new | | Number of Items | 1 | | Part Number | Fgphos-new | | Scent | Sour | | Size | 1 Quart / 950ml Bottle | | Special Features | Rust Resistant | | Specific Uses For Product | Drain | | Surface Recommendation | Metal | | UPC | 840194133708 | | Unit Count | 32.1 Fluid Ounces | ## Product Details - **Brand:** Duda Energy - **Item Form:** Liquid - **Item Volume:** 950 Milliliters - **Scent:** Sour - **Specific Uses For Product:** Drain ## Images ![1 Quart / 950ml 85% Food Grade Phosphoric Acid Rust Remover Clean Etch Metal - Image 1](https://m.media-amazon.com/images/I/61cPTRRNZeL.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: I heard I should use Phosphoric acid to etch grout before applying a sealant. Would this product be good for that?** A: using Phosphoric acid on grout will basically erode or eat away a very fine layer of grout. this opens the pores and gives the grout more bite for the color seal to bond. When grout cures after installation, it gets almost like a skin on the surface from settling, or at least a tighter surface tension. When you hit this with Phosphoric acid, it opens it up and makes it slightly rougher. If you don't color seal, it will make it more prone to staining in the future. It doesn't always need to be done, but it will help the color seal bond. **Q: Can I use this on rusty kitchenware? Like pots and pans,?** A: This can be used as a rust remover. Be sure to use gloves! Great for cleaning residue from metals. **Q: Can I clean the rust from cast iron cooking pans with this? It says it has an inhibitor that remains behind, so I wasn't sure if it would be safe.** A: USE POTATO AND COURSE SALT TO CLEAN CAST IRON. but FIRST !!! PUT IT IN A RED HOT CAMP FIRE COALS AND BURN IT OFF BEST WAY!!! THEN AFTER IT COOLS OFF ENOUGH TO NOT CATCH THE VEG OIL ON FIRE WHEN YOU APPLY IT TO THE CAST IRON. BEST results! you can use charcoal also **Q: I use a bathroom cleaner that contains 3.5% phosphorus acid. Is this product suitable for diluting to 3.5% with water for use as a bathroom cleaner?** A: Yes, diluted phosphoric works well as a lime and hard water deposit remover for concrete, tile, and other stone surfaces. ## Frequently Bought Together - Duda Energy 1 Quart / 950ml 85% Food Grade Phosphoric Acid Rust Remover Clean Etch Metal - Viva Doria 100% Pure Citric Acid, Food Grade, Fine Grain, 2 lb (907 g) - 2 Pack pH Test Strips, 160 Strips pH.1-14 Universal pH Test Paper Litmus Test Paper pH Soap Making Testing Strips for Water Wine Saliva Urine Soil Testing Pet Food and Diet pH Monitoring (Sealed Pack) --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.us/products/40824609-1-quart-950ml-85-food-grade-phosphoric-acid-rust-remover](https://www.desertcart.us/products/40824609-1-quart-950ml-85-food-grade-phosphoric-acid-rust-remover) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-08-06*