Preparation:
Method one: The preparation method is the reaction vessel with stirring hydrazine sulfate into wet basis, a small amount of catalyst is added, and then into ammonium thiocyanate, open jacket steam heating under reflux 3.5h, cooled, discharge, filtered, washed with water , vacuum filter to dryness to give the finished product.
Method Two: Hydrazine sulfate and thiocyanate amines by condensation, heavy discharge, too.
Storage features: Treasury ventilated low-temperature drying; oxidants, acids stored separately
Toxicity rating: high toxicity
Acute toxicity: Oral - Rat LD50: 500 mg / kg; celiac - Mouse LD50: 100 mg / kg
Health Hazard: heat decomposition of toxic emissions of nitrogen oxides and sulfur oxides
Category: Pesticides
Extinguishing Media: Water, dry chemical, dry sand, carbon dioxide, foam, extinguishing agent 1211
Use one: Is 2,5-Dithiobiurea leaf blight fungicide intermediates.
Uses two: pesticide and pharmaceutical intermediates.
Appearance: Bisthiourea pure product as a white crystalline solid, mp206 ~ 208 ℃, in hot water with some solubility, soluble in pyridine, triethylamine, dimethylformamide and general solvent.
More about:2,5-Dithiobiurea suppliers
From:chemical reagent
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