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AMMONIUM CHROMATE

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AMMONIUM CHROMATE Basic information
AMMONIUM CHROMATE Chemical Properties
  • Melting point:180°C (dec.)
  • Density 1.91 g/mL at 25 °C(lit.)
  • solubility H2O: 1 M at 20 °C, clear, yellow
  • form Crystalline
  • Specific Gravity1.91
  • color Yellow-orange
  • Water Solubility Soluble in water. Slightly soluble in liquid ammonia, acetone, methanol. Insoluble in ethanol.
  • Merck 14,510
  • CAS DataBase Reference7788-98-9(CAS DataBase Reference)
  • EPA Substance Registry SystemAmmonium chromate (7788-98-9)
Safety Information
MSDS
AMMONIUM CHROMATE Usage And Synthesis
  • Chemical PropertiesAmmonium chromate is a yellow crystalline compound which can be used in solution, which is yellow with an ammonia odor.
  • UsesSensitizing gelatin in photography, in textile printing pastes, in fixing chromate dyes on wool, and as a reagent in analytical chemistry.
  • HazardToxic by inhalation, strong irritant. Con- firmed carcinogen.
  • Safety ProfileA poison. Mutation data reported. See also CHROMIUM COMPOUNDS. A powerful oxidizer. An explosion hazard when shocked or heated. When heated to decomposition it emits toxic fumes of NH3, Cr03, and NOx. Incompatible with reducing agents.
  • Potential ExposureIt is used to inhibit corrosion and in dyeing, photography and many chemical reactions. Used as a fungicide and fire retardant.
  • ShippingUN3288 Toxic solids, inorganic, n.o.s., Hazard Class: 6.1; Labels: 6.1-Poisonous materials, Technical Name Required.
  • Purification MethodsCrystallise it from weak aqueous ammonia (ca 2.5mL/g) by cooling from room temperature. It loses NH3 on heating to form ammonium dichromate. POISONOUS.
  • IncompatibilitiesA strong oxidizer and an explosive. Contact with combustible, organic and other readily oxidizable substances may cause fire and explosions. Hydrazine, other reducing agents. Corrosive to metals.
  • Waste DisposalConsult with environmental regulatory agencies for guidance on acceptable disposal practices. Generators of waste containing this contaminant (≥100 kg/mo) must conform with EPA regulations governing storage, transportation, treatment, and waste disposal. Addition of a large volume of a reducing agent solution (hypo, bisulfite or ferrous salt, and acidify with 3 M sulfuric acid). When reduction is complete, flush to drain with large volumes of water.
AMMONIUM CHROMATE Preparation Products And Raw materials
AMMONIUM CHROMATE(7788-98-9)Related Product Information
AMMONIUM CHROMATESupplierMore
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