Copper Sulfate Crystals 99% Pure is a high-purity copper sulfate pentahydrate (CuSO₄·5H₂O) in a fully water-soluble crystalline form. Lab tested at 99% purity with no fillers or binders, it delivers a predictable, consistent copper concentration per measured dose — important for applications where accurate dosing matters.
It is one of the most versatile compounds a grower or homeowner can keep on hand. Common uses include pool and pond algae management, preparing Bordeaux mixture for garden and orchard disease programs, correcting copper deficiency in sandy and high-organic soils confirmed by a soil test, and livestock hoof footbaths. Copper is also an essential plant micronutrient that supports enzyme systems, photosynthesis, and cell wall formation. The stable crystalline form keeps its potency indefinitely when stored cool and dry.
Copper sulfate is potent and dosing depends on site conditions, so test water alkalinity or soil copper before applying, and follow rates appropriate to your use. Always dissolve crystals in a plastic, fiberglass, or wood container — never metal. Keep away from children, pets, food, feed, and drinking water; check local regulations before any drain-line use.
CDFA registered and third-party lab tested for heavy metals, with results consistently well below required limits.