--- product_id: 14964367 title: "Copper Sulfate Pentahydrate - Crystals - 25.2% Cu - 5 Pounds" brand: "alpha chemicals" price: "€ 116.99" currency: EUR in_stock: true category: "Alpha Chemicals" url: https://www.desertcart.pt/products/14964367-copper-sulfate-pentahydrate-crystals-25-2-cu-5-pounds store_origin: PT region: Portugal --- # Pentahydrate crystal form 5 lbs resealable bulk pack 25.2% pure Cu assay Copper Sulfate Pentahydrate - Crystals - 25.2% Cu - 5 Pounds **Brand:** alpha chemicals **Price:** € 116.99 **Availability:** ✅ In Stock ## Summary > 💎 Elevate your experiments and garden game with crystal-clear precision! ## Quick Answers - **What is this?** Copper Sulfate Pentahydrate - Crystals - 25.2% Cu - 5 Pounds by alpha chemicals - **How much does it cost?** € 116.99 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/14964367-copper-sulfate-pentahydrate-crystals-25-2-cu-5-pounds) ## Best For - alpha chemicals enthusiasts ## Why This Product - Trusted alpha chemicals brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Bulk Ready:** Generous 5-pound resealable bag keeps freshness intact - • **Versatile Use:** Perfect for crystal growing, moss control, and pool maintenance - • **Crystal Clarity:** Distinct pentahydrate crystals ideal for experiments & visual appeal - • **Trusted & Rated:** 4.6-star rating from 271 users proves consistent effectiveness - • **Lab-Grade Purity:** Guaranteed 25.2% copper content for reliable results ## Overview Copper Sulfate Pentahydrate Crystals with 25.2% copper content, supplied in a convenient 5-pound resealable bag. Ideal for scientific experiments, crystal growing, and effective moss and algae control. Highly rated by users for fast, reliable results. ## Description Shipped in a resealable bag that is sealed for safety and freshness. It includes a tear-off tab for easy opening. ## Features - Chemical Structure - CuSO4*5H2O - Crystal Form (see second picture) - Great for crystal growing and other experiments - We sell bulk for so many different uses, we don't include any specific use instructions ## Technical Specifications | Specification | Value | |---------------|-------| | % Assay of Chemical(s) | 25.2 | | ASIN | B00KDH7G8O | | Best Sellers Rank | #122,254 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #2,255 in Garden Fertilizers | | Brand Name | Alpha Chemicals | | Customer Reviews | 4.6 4.6 out of 5 stars (273) | | Item Form | Crystal | | Item Weight | 5 pounds | | Manufacturer | Alpha Chemicals | | UPC | 725410979233 | | Unit Count | 80 Fluid Ounces | | Volume | 5 liters | ## Product Details - **Brand:** Alpha Chemicals - **Item Form:** Crystal - **Item Volume:** 5 liters - **Item Weight:** 5 pounds - **Percentage assay:** 25.2 ## Images ![Copper Sulfate Pentahydrate - Crystals - 25.2% Cu - 5 Pounds - Image 1](https://m.media-amazon.com/images/I/41d+tFjIE8L.jpg) ## Questions & Answers **Q: Can I use this to make a Bordeaux mixture?** A: Hi - not sure about the Bordeaux mixture but I can confirm the granules dissolve fairly easily. I’ve been using this in a fountain and small pool to control algae growth. It has a blue color. Hope this helps! **Q: I want to sprinkle it around my dock to kill the hydrillas. Will the crystals sink?** A: No! This is a very bad idea. Copper sulfate can be toxic to fish and other organisms. Copper sulfate results in copper build up in pond sediments and creates a sterile bottom in the pond. Besides many important organisms, it kills beneficial bacteria. Studies with several aquatic species have found copper to be highly to very highly toxic to fish and aquatic life. Trout, koi and juvenile fish of several species are known to be particularly sensitive to copper. Fish kills have been reported after copper sulfate applications for algae control in ponds and lakes. You could be cited for criminal vandalism and hurting wildlife if you use this in a public pond or stream. Please do not kill fish and all life in the pond with this highly toxic product. It is harmless to humans but very toxic to fish. Just dig out the offending plant or get fish that will eat it - as long as its a native fish to the pond. Don't mess with nature, please! **Q: is this product used to kill a tree stump ?** A: I have used this product to kill the roots of a tree that was causing issues by blocking an area of the drain. **Q: can this product be used with a drain foaming agent ?** A: RE: Cupric Sulfate-Pentahydrate: I have never used this product for any other reason than to treat (kill) tree roots in my septic pipes. By itself it does not foam but my understanding that used with foaming sewer line cleaners, it augments/enhances the foaming-cleaning action of such products of which there are many different formulations. ## Frequently Bought Together - Copper Sulfate Pentahydrate - Crystals - 25.2% Cu - 5 Pounds - Zinc Sulfate Monohydrate - 35.5% Zn - 99% Pure - 1 Pound - Ferrous Sulfate Heptahydrate - FeSO4*7H2O - 20% Iron - Very Soluble - 5 Pounds --- ## 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.pt/products/14964367-copper-sulfate-pentahydrate-crystals-25-2-cu-5-pounds](https://www.desertcart.pt/products/14964367-copper-sulfate-pentahydrate-crystals-25-2-cu-5-pounds) --- *Product available on Desertcart Portugal* *Store origin: PT* *Last updated: 2026-10-10*