Copper Oxide

Action/Use:

Fungicide

Use: Seed, seedling treatment to protect against damping-off. Dust or spray for fruit and vegetable diseases; foliage application against blight, downy mildew, and rust. Nonphytotoxic except to brassicae and copper-shy varieties. Copper Sandoz* for horticultural crops.

Chemistry

Properties: Amorphous powder, yellow to red color range (Cuprox*, red). Liable to oxidation to cupric oxide and to conversion to a carbonate on exposure to moist air and apt to corrode aluminum. Practically insoluble in organic solvents. Soluble in dilute mineral acids and in aqueous solutions of ammonia and its salts.

Environmental Guidelines

Hazards: Fish: Toxic. Copper Sandoz*: Fish: Nontoxic. LC₅₀ up to 50 ppm (48 h/WHO test) (goldfish)

Water Solubility: Practically insoluble

Safety Guidelines

Signal Word: CAUTION

Toxicity Class: III

Toxicity: Copper Nordox* (Rat): Oral LD₅₀ 1500 mg/kg

Handling/storage Cautions: Keep out of lakes, streams, or ponds. Do not apply when weather conditions favor drift from treated areas. Do not contaminate water by cleaning of equipment or disposal of wastes near a body of water. Handle without spillage. Spillage is collected by brush or vacuum cleaner and has to be recycled

Protective Clothing: Protective eyewear.

Suppliers and Branded Products

Basic Producers:

American Chemet Corp. (AG Copp 75, Chem Copp 50)

Ingenieria Industrial, S.A. de C.V. (Cuprocob*, Cuprocop*, Cuprox*)

Krishi Rasayan Exports Pvt. Ltd.

NORDOX AS (Nordox*, Oleo Nordox*)

Phibro-Tech, Inc.

Quimetal Industrial SA (Cuprodul*, Cuprodul* FLO)

Shenzhen QinFeng Pesticides Co., Ltd.

Spiess-Urania Chemicals GmbH

Syngenta (Caocobre*, Copper Sandoz*)