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Old Bridge Chemicals

North America’s Largest Manufacturer of Copper and Zinc Compounds
Established 1962

Copper Sulfate Pentahydrate Fine Crystals (Pesticide Label)

Copper Sulfate Pentahydrate Fine Crystals (Pesticide Label)

Copper Sulfate Pentahydrate is an odorless blue crystal that readily dissolves in water. It is also soluble in methanol, glycerol and slightly soluble in ethanol. Copper Sulfate, sometimes referred to as Blue Vitriol or Bluestone, is a readily available and economic source of copper.

Product Sheet

Old Bridge Chemicals, Inc.
554 Waterworks Rd.
Old Bridge, New Jersey 08857

Typical Analysis

Common Name: COPPER SULFATE PENTAHYDRATE (CuSO4 – 5H20) Fine Crystal


Copper (Cu): 25.2% minimum
Cu Sulfate Pentahydrate: 99% minimum
Lead (Pb): 25 ppm maximum
Iron (Fe): 250 ppm maximum
Cadmium (Cd): 3 ppm maximum
Arsenic (As): 2 ppm maximum
Chromium (Cr): 25 ppm maximum
Antimony (Sb): 3 ppm maximum
Mesh – Fine Crystals: 100 – 30 mesh

ppm – parts per million


Copper salts, including copper Sulfate Pentahydrate Fine Crystals, are regularly used to prevent the development of algae in potable water reservoirs. The salts are employed to control green slime and similar algal scums in farm ponds, rice fields, irrigation and drainage canals, rivers, lakes and swimming pools. Another well-known use for copper compounds is as a molluscicide for the control of slugs and snails.

Copper Sulfate Pentahydrate Fine Crystals, minus 30 mesh, control tadpole shrimp populations in flooded rice fields, as well as contain the spread of various fungal diseases. The fine crystals are also applied in sewer treatment to destroy roots.

Copper Sulfate Pentahydrate Fine Crystals serve as the main ingredient for manufacturing Bordeaux and Burgundy mixtures that are used as algaecides, both on the farm and to ensure safe water supplies. Bordeaux mixtures are also employed to adjust and maintain copper deficient soils to optimum levels.

OB’s Copper Sulfate Pentahydrate Crystals are registered with the Environmental Protection Agency for pesticide applications (EPA Reg. No.46923-4). Please refer to the EPA approved labels for specific instructions.


Copper Sulfate should be stored in a cool, dry place. Keep containers closed. Solutions of Copper Sulfate should be stored in tanks fabricated of Type 316 Stainless Steel, rubber-lined steel tanks or plastic tanks.

Safe Handling

Copper Sulfate is acidic and causes severe eye irritation. It may be irritating to the skin and may cause sensitization reactions in certain individuals. Avoid breathing the dust as it may be irritating to the upper respiratory tract. Contact with eyes and skin should be avoided through the use of safety goggles and rubber gloves. In case of eye contact, immediately flush eyes with plenty of water for 15 minutes and call a physician. If Copper Sulfate is ingested, give large amounts of milk or water. Call a physician. Contaminated clothing should be thoroughly washed before reuse. Refer to Old Bridge Material Safety Data Sheet entitled “Copper Sulfate.”

Environmental Hazards

Copper Sulfate is toxic to fish and aquatic organisms. If product is spilled, comply with Federal, State and local regulations on reporting spills. Refer to Old Bridge Material Safety Sheet and labels for further details.

Supply and Shipping

Old Bridge Chemicals, Inc. provides Copper Sulfate in 50 pound multi-wall bags and supersacks. DOT Hazard Class: Environmentally Hazardous Substance, solid, NOS. (Cupric Sulfate) 9, UN3077, PGIII, RQ, Marine Pollutant, ERG 171

Manufactured in the United States of America