OMRI-Listed Copper Sulfate Pentahydrate for Fertigation, Hydroponic & Organic Use

Chem One Copper Sulfate Fine Crystals is a 99%+ pure copper sulfate pentahydrate in a fine particle size (80% passing mesh 60) — engineered for fast, complete dissolution in fertigation systems, hydroponic nutrient solutions, and Bordeaux mixture preparation. Delivering 25% copper (Cu) minimum derived from copper sulfate, it is OMRI listed and certified for use in organic agriculture under USDA NOP rules.

Copper is essential for enzyme activation, photosynthesis, and lignin synthesis. At trace levels, it keeps plant metabolism running efficiently. Chem One's fine crystal format ensures rapid dissolution and precise dosing — critical when working at the 0.01–0.1 ppm range required in hydroponic systems.

Guaranteed Analysis

• Copper (Cu): 25.0% minimum — derived from Copper Sulfate Pentahydrate
• Active ingredient: Copper Sulfate Pentahydrate 99.0% (CAS #7758-99-8)
• Anti-caking agent: MgCaCO3 1.0%

Typical Chemical Analysis

• Purity: 99.0% min (99.56% typical)
• Copper (Cu): 25.2% min (25.34% typical)
• pH (5% solution): 3.0–5.0
• Iron (Fe): 1,000 ppm max (720 ppm typical)
• Zinc (Zn): 500 ppm max (270 ppm typical)
• Nickel (Ni): 50 ppm max (<10 ppm typical)
• Sodium (Na): 1,000 ppm max (<200 ppm typical)
• Particle size: 80% minimum passing mesh 60
• Certified to NSF/ANSI Standard 60 and meets ANSI/AWWA standards

Hydroponic & Fertigation Application Rates

• Target range: 0.01–0.1 ppm copper in working nutrient solution
• Stock solution: Dissolve 0.15 g in 1 liter of water; apply at 1–10 mL/gallon of working solution to achieve 0.01–0.1 ppm Cu

Additional Uses

• Bordeaux mixture preparation for fungal and disease management
• Animal feed trace mineral additive (at levels per good feed manufacturing practices)
• Algaecide and fungicide manufacturing and formulation
• Hoof rot foot bath treatment for cattle

State restrictions: For Wisconsin, California, Oregon, and Washington — refer to back panel for fertilizer recommendations.

⚠️ Ships as a HAZARDOUS MATERIAL: Environmentally hazardous substances, solid, n.o.s. (cupric sulfate) — UN3077, Class 9, PG III. Hazmat shipping surcharges apply.

Product Label (PDF)  |  Safety Data Sheet (PDF)