Copper Sulfate Pentahydrate Crystals - 25.2% Cu, 5 Pounds

In this review the product is judged as a straightforward, bulk chemical for hobbyists and small-scale users. The Copper Sulfate Pentahydrate crystals arrive as crystalline granules and are most useful for crystal growing projects and general laboratory or garden tasks where copper sulfate is appropriate. The single biggest reason to buy is the combination of a clear chemical identity, substantial 5 pound quantity, and value: buyers get high-purity CuSO45H2O crystals in a resealable, safety-sealed bag that keeps the contents fresh and easy to handle.

Key Features

• Chemical Structure: The product is labeled as CuSO45H2O so users know they are getting the pentahydrate form commonly used in experiments and gardening tasks.
• Crystal Form: The crystals are supplied in a crystalline form that works well for visual crystal growing and controlled dissolution in solutions.
• Packaged for Freshness: The 5 pound supply is shipped in a resealable bag with a tear-off tab to maintain safety and preserve the material between uses.
• Bulk Quantity: Five pounds provides enough material for multiple experiments, garden treatments, or extended hobby projects without frequent repurchasing.
• Clear Labeling: The listing specifies 25.2% Cu which helps users estimate concentration and plan measurements for solutions or treatments.

Who It's For

This product is aimed at hobby chemists, educators, and gardeners who need a reliable bulk supply of copper sulfate pentahydrate for crystal growth, classroom demonstrations, water treatment experiments, or certain lawn and garden tasks. Its crystal form and explicit CuSO45H2O identity make it suitable for anyone who wants reproducible results with a known salt.

It is not for users who need finished applicator kits, detailed usage instructions, or user-specific dilution guidance; the seller does not provide application directions. Anyone requiring labeled consumer formulations or pre-measured doses should look for specialized garden or pool products instead.

Pros & Cons

Pros

• Effective crystalline CuSO45H2O that reviewers describe as working well for algaecide solutions and producing clear water.
• Good value for the quantity; customers report it is economical for repeated use.
• Resealable, safety-sealed bag with tear-off tab preserves freshness and simplifies storage.

Cons

• Seller does not include specific usage instructions, so beginners must rely on external guidance for safe handling and correct dilution.

Specifications

Product name	Copper Sulfate Pentahydrate - Crystals
Formula	CuSO45H2O
Copper content	25.2% Cu
Form	Crystals (see product image)
Net weight	5 pounds
Packaging	Resealable safety-sealed bag with tear-off tab

Our Verdict

This 5 pound bag of copper sulfate pentahydrate is a solid choice for hobbyists, educators, and gardeners who need a clear, crystalline bulk supply. It offers good value and practical packaging that keeps crystals fresh, but buyers should be prepared to consult external resources for safe handling and proper dosing.

Frequently Asked Questions

What is the chemical form?
The product is CuSO45H2O, the pentahydrate crystalline form of copper sulfate.

How is it packaged?
It ships in a resealable, safety-sealed bag with a tear-off tab for easy opening and storage.

Does the seller provide usage instructions?
No, the listing does not include specific use or dilution instructions; users should follow external safety guidance.