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Common NameCuprous oxide
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中文通用名氧化亚铜
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IUPACcopper(I) oxide
or
copper(1+) oxide
or
cuprous oxide -
CAScopper oxide (Cu2O)
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CAS No.1317-39-1
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Molecular FormulaCu2O
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Molecular Structure
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Category
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ActivityFungicide
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PremixMetalaxyl-M+Cuprous oxide
Metalaxyl+Cuprous Oxide
Cymoxanil+Cuprous oxide
Cuprous oxide+Dimethomorph
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Physical PropertiesMolecular weight:143.1; Physical form:Red-brown powder. Composition:Contains 86% Cu++. Melting point:1235 °C; Vapour pressure:Negligible; Solubility:Practically insoluble in water and organic solvents. Soluble in dilute mineral acids and in aqueous ammonia and its salts.; Stability:Liable to oxidation to cupric oxide and to conversion to a carbonate on exposure to moist air.
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ToxicologyOral:Acute oral LD50 for rats 1500 mg/kg. Percutaneous:Acute percutaneous LD50 for rats >2000 mg/kg. Moderate to minimal irritation to skin. Inhalation:LC50 for rats 5.0 mg/l air. Phytotoxicity:Non-phytotoxic when used as directed, except to brassicas and copper-sensitive plants. Russetting is possible with some varieties of fruit.
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Environmental ProfileEcotoxicology:
Bees:LD50 >25 μg/bee.Birds:Not harmful; no significant history of ill-effect on birds.Daphnia:LC50 (48 h) 18.9 μg/l. Fish:LC50 (48 h) for young goldfish 60, adult goldfish 150, young guppies 50 mg/l.Worms:Under conditions of moderate use and cultivation, the hazard to earthworms, and hence to soil structure, is insignificant. Environmental fate:
Animals:Copper is an essential element and is under homeostatic control in mammals.Soil:Copper is strongly adsorbed to surfaces of minerals and organic matter, hence soil mobility is very low. In water, copper ions have a strong tendency to form complexes or to be adsorbed, followed by sedimentation. In the sediment, copper reacts with organPlant:Plants resist copper accumulation and translocation to stems, leaves or seeds. Most plants growing on soils containing up to 1000 ppm copper showed only slight elevation in copper content compared to plants grown in normal soils. -
Transport InformationHazard Class:II (Moderately hazardous)
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