Copper hydroxide

TC & FORMULATION: 95%TC, 77%WP，53.8%WDG, 57.8%WDG, 37.5%SC

Structure Formula: 

NOMENCLATURE

IUPAC name copper hydroxide; copper(II) hydroxide; cupric hydroxide 

Chemical Abstracts name copper hydroxide (Cu(OH)2) 

CAS RN [20427-59-2] 

PHYSICAL CHEMISTRY

Mol. wt. 97.6  M.f. CuH2O2  Form Blue-green solid.  Solubility In water 2.9 mg/l (pH 7, 25 ºC). Readily soluble in aqueous ammonia. Insoluble in organic solvents.  Stability Dehydrated >50 ºC for extended periods. Decomposes at 140 ºC. 

APPLICATIONS

Biochemistry Non-specific thiol reactant, inhibiting respiration. Copper-II-ion (Cu++) is taken up by the spores during germination and accumulates until a sufficiently high concentration is achieved to kill the spore cell; the activity is limited to the prevention of spore germination.  Mode of action Protectant fungicide and bactericide. Deposits must be on the crop before fungal spores begin to germinate.  Uses For control of Peronosporaceae in vines, hops, and brassicas; Alternaria and Phytophthora in potatoes; Septoria in celery; and Septoria, Leptosphaeria, and Mycosphaerella in cereals, at 2-4 kg/ha or 300-400 g/100 l. Formulation types SC; WP.  Compatibility Not compatible with acids, dicloran or calcium polysulfide. 

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