Calcium cyanamide 156-62-7

  Calcium cyanamide, also known as calcium cyanamide, is a mixture of calcium cyanamide (CaCN2), calcium oxide (CaO), and other insoluble impurities. Pure product is colorless crystals. Industrial calcium cyanamide typically contains 20% nitrogen (N), 58%-60% calcium cyanamide, 20%-28% calcium oxide, 9%-12% free carbon, less than 0.2% calcium carbide (CaC2), less than 1.2% free cyanamide (maximum limit), and small amounts of silicon, aluminum, and iron. It appears as a dark gray/black gray powder or granules with an odor of calcium carbide or ammonia. It hydrolyzes in water to form monocyanamide and calcium hydroxide and is insoluble in alcohol. Calcium cyanamide is insoluble in water and is a strongly alkaline, slow-release nitrogen fertilizer. It has systemic toxic effects, particularly on the vasomotor and respiratory centers and the blood, leading to autonomic neurasthenia and dysfunction of endocrine organs and basal metabolism. Acute poisoning may cause organic neurological disorders, limb weakness, and subsequent polyneuritis. The lethal dose for humans is approximately 40-50g. Chronic poisoning often results in asthmatic bronchitis and bronchial asthma, chronic gastritis and hepatitis, low blood pressure, myocardial dystrophy, sexual dysfunction, thyroid and adrenal dysfunction, dry, itchy skin, and dermatitis. Contact with the eyes can cause purulent conjunctivitis, corneal ulcers, and clouding. Emergency treatment is to remain still. For ocular mucosal injuries, rinse thoroughly with water or saline, then apply 1% novocaine solution to the eye. For acute dermatitis, apply a wet bandage made of lead water and apply a tight compress. For minor burns, apply a 1%-2% alcohol solution of gentian violet, methylene blue, or brilliant green to the affected area. Minor injuries can be treated with tincture of iodine, furazolidone, and antiseptic adhesive tape. Workers should wear work clothes made of dense fabric, gloves, protective glasses, and masks. Apply a non-irritating fatty ointment to the skin of your hands first. Strictly observe personal hygiene measures. The chemically pure product is a colorless hexagonal crystal. The industrial product is a dark gray powder due to impurities such as carbon (graphite). It has an odor of calcium carbide or ammonia and is insoluble in water. Uses: Calcium cyanamide is used as a carburizing agent, a desulfurizer for pig iron, and in the manufacture of sodium cyanide, cyanamide, dicyandiamide, and melamine. It is also used as a defoliant or herbicide. Calcium cyanamide, also known as lime nitrogen, calcium carbonitride, or calcium cyanamide, is primarily used in the production of carbendazim, benomyl, and the intermediate monocyanamide in pesticides. As a fertilizer, due to its strong alkalinity, calcium cyanamide is suitable for acidic soils and is generally used as a base fertilizer. When in contact with water, it initially forms cyanamide, which is toxic to plants, but quickly converts to ammonia. This toxicity causes plant leaves to fall off, leading to its use as a herbicide, fungicide, insecticide, and cotton defoliant. Calcium cyanamide is also used as a raw material in the production of plastics and explosives. It can also be used in steel nitriding, gold and silver ore processing, the removal of nitrogen oxides from exhaust gases, the removal of formaldehyde from wastewater, and as a corrosion inhibitor for brine. As a fertilizer, calcium cyanamide, due to its strong alkalinity, is suitable for acidic soils and is generally used as a base fertilizer. When it comes into contact with water, it initially forms cyanamide, which is toxic to plants, but quickly converts to ammonia. This toxic effect can cause plant leaves to fall off, leading to its use as a herbicide, fungicide, insecticide, and cotton defoliant. Industrially, it is used in steel nitriding, gold and silver ore processing, the removal of nitrogen oxides from exhaust gases, the removal of formaldehyde from wastewater, and as a corrosion inhibitor for brine. Calcium cyanamide can also be used as a raw material in the production of plastics, pesticides, and explosives. It is used in the manufacture of cyanide compounds, fertilizers, and pesticides. It is an alkaline fertilizer and a major raw material for the highly effective, low-toxic pesticide carbendazim. It can be used as a herbicide, fungicide, and insecticide to prevent the spread of schistosomiasis, root rot, rust, and white mold, and to kill snails and leeches. It can also be used as a cotton defoliant and soil conditioner. It is a basic raw material in the organic synthesis and plastics industries, and can be used in the production of dicyandiamide, melamine, and cyanide melt.