Copper Sulfate Crystals 5 Lb Granular EPA Free - Multiuse Lab Reagent

In this review of Mendeleev Style Copper Sulfate Crystals 5 Lbs the bottom line is straightforward: this granular reagent is aimed at hobbyists, small labs, and tradespeople who need a versatile, industrial-strength copper sulfate for multiple preparation tasks. The reviewer found it most useful for making Bordeaux and Burgundy mixtures, as a timber preservative ingredient, and as an electrolyte for simple copper plating projects. It is not a consumer-grade pond treatment for sensitive species, so buyers working with koi, goldfish, or trout should approach with caution.

Key Features

• 5 lb granular pack: Provides a substantial quantity suitable for repeated use in garden mixes, small workshop plating, or continued lab practice without frequent repurchase.
• Multiuse application: Works for preparation of Bordeaux and Burgundy mixtures and as a base component in various wood preservative formulations.
• Electroplating electrolyte: Can serve as the electrolyte for copper plating and electroforming projects, making it useful for hobby metalworkers and prototypers.
• Etching and coating: Functions as a printing etching agent and for copper coating on steel wire when used with appropriate process controls.
• EPA free designation: Sold without EPA-restricted claims, so it is positioned for industrial and laboratory use rather than regulated pesticide applications.

Who It's For

This product suits DIY metalworkers, educators running small lab demonstrations, and gardeners or arborists preparing traditional Bordeaux or Burgundy fungicidal mixes. It is also appropriate for anyone experimenting with small-scale electroforming or needing a granular copper sulfate for etching and coating tasks.

It is not intended for pond treatments where sensitive species like koi, goldfish, or trout are present, and operators needing a ready-to-use, labeled aquatic algaecide should look elsewhere. Also, the product is not available for sale in Washington, so buyers in that state must seek alternatives.

Pros & Cons

Pros

• Generous 5 lb quantity reduces the need for frequent repurchases and supports multiple projects.
• Versatile across applications from Bordeaux mix preparation to copper electroplating and etching.
• Granular powder form is easy to measure and dissolve for solutions used in plating or wood preservative prep.
• Suitable for small workshops and labs as a reliable inorganic reagent.

Cons

• Contains active copper that is toxic to sensitive pond fish, so it is unsuitable for aquaria with koi, goldfish, or trout.
• Not available for sale in Washington, limiting accessibility for some buyers.

Specifications

Product name	Copper Sulfate Crystals 5 Lb
Brand	MENDELEEV STYLE
Form	Granular powder
Primary uses	Bordeaux and Burgundy mixtures, timber preservative, electroplating, etching
Pack size	5 lbs
Regulatory note	EPA free; not for sale in Washington

Our Verdict

Mendeleev Style Copper Sulfate Crystals 5 Lbs is a practical, value-oriented reagent for hobbyists and small labs who need a multipurpose inorganic chemical for plating, etching, and preservative preparation. Buyers working with sensitive aquatic species or requiring state-available products should consider alternatives, but for general industrial and scientific tasks this pack offers solid utility and economical volume.

Frequently Asked Questions

Can this be used to treat pond algae?
It is not recommended for ponds containing koi, goldfish, or trout because these species are extremely sensitive to copper sulfate; use minimal copper-based products in such ponds.

Is this product ready to use for electroplating?
The crystals serve as an electrolyte component for copper plating and electroforming, but users must prepare proper solutions and controls before plating.

Are there sales restrictions?
The product is sold as EPA free and is not available for sale in Washington state, so check local availability before ordering.