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cuprous oxide |
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| Editor | I.G. Ferris |
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| Entity code | CUOXI | |
| CAS registry No. | 1317-39-1 | |
| Family | Inorganics | |
| Functions | Fungicide | |
| Chemical name | copper(I) oxide (IUPAC or) (EN); copper(1+) oxide (IUPAC or) (EN); cuprous oxide (IUPAC) (EN); copper oxide (Cu2O) (EN) | |
| Synonyms | ||
| Trade names | Copper Nordox (Nordox); Perenox (ICI); Yellow Cuprocide (Rohm & Haas); Copper-Sandoz (Sandoz); Cobre Sandoz (Sandoz); Kuper Sandoz (Sandoz); Caocobre (Sandoz); Fungi-Rhap (CP Chemicals) | |
| Other names | ||
| Last updated | 7/3/2008 | |
Fate
Since copper is an element it will persist indefinitely. Copper is bound, or adsorbed, to organic materials, and to clay and mineral surfaces. The degree of adsorption to soils depends on the acidity or alkalinity of the soil.
Toxicology
Mammals: Acute oral LD50 for rats 40 mg/kg. Sheep and calves are somewhat copper-sensitive and livestock should not be allowed to graze on newly sprayed fields. No chronic toxic effects have been observed in rats receiving a 500 mg/kg copper in their diet. No record of occupational diseases attributable to copper.
Detection
Sampling
Methods
MRLs
Uses
Control of blights, downy mildews, rusts, and leaf spot diseases in a wide range of crops, including potatoes, tomatoes, vines, hops, olives, pome fruit, stone fruit, citrus fruit, beetroot, sugar beet, celery, carrots, coffee, cocoa, tea, bananas, etc.
Notes
Bibliography
Specification (old) http://www.fao.org/ag/AGP/AGPP/Pesticid/Specs/docs/cppr.doc
US EPA Coppers RED http://www.epa.gov/oppsrrd1/REDs/copper_red.pdf
IPCS INCHEM (Copper and copper salts (http://www.intox.org/databank/documents/chemical/copper/pimg002.htm)
Mode of action
Fungicide with protective action. Cuprous oxide has multi-site activity. Because of its strong bonding affinity to amino and carboxyl groups, it reacts with proteins and acts as an enzyme inhibitor.
Ecotoxicology
Fish: LC50 for young goldfish 60, adult goldfish 150, young guppies 50 mg/l (48 hours). Bees: Non-toxic to honey bees.
Plant metabolism & residues
| Property | Value | |
|---|---|---|
| Molecular weight | 0 | |
| Melting point | 0 °C | |
| Vapour pressure | 0 mPa | |
| Water solubility | 0 mg/l | |
| Octanol/water partition coefficient (log10 Kow) | 0 | |
| Dissociation constant | 0 |
Notes
| Property | Value | |
|---|---|---|
| Rat LD50 (oral) | 0 mg/kg bw | |
| Acceptable daily intake | 0 mg/kg/day |
Notes
| Property | Value | |
|---|---|---|
| Soil organic carbon partition coefficient (log10 Koc) | 0 l/kg | |
| Soil DT50 aerobic | 0 day |
Notes
| Property | Value |
|---|
Notes