Ferric ammonium chromate

Ferric ammonium chromate, (NH4)2Cr04.Fe2(Cr04)3.4H20, and ferric potassium chromate, K2Cr04.Fe2(Cr04)3.4H20, have been prepared 2 as dark red crystalline plates by the slow evaporation of mixed solutions of ferric chloride and ammonium (or potassium) dichromate. [Pg.172]

Cupric sulfate anhydrous Cupric sulfate pentahydrate Direct brown 95 Ferric ammonium ferrocyanide Ferric chloride Ferric chloride hexahydrate Ferric sulfate Lead chromate oxide Lead molybdate Mercury sulfide (ic), black Mercury sulfide (ic), red Molybdenum trioxide 3-Naphthol Nonoxynol-55 Phosphomolybdic acid... [Pg.5525]

The most suitable oxidizing agent is potassium ferricyanide, but ferric chloride, hydrogen peroxide ia the presence of ferrous salts, ammonium persulfate, lead dioxide, lead tetraacetate or chromate, or silver and cupric salts may be useful. Water mixed, eg, with methanol, dimethylformamide, or glycol ethers, is employed as reaction medium. [Pg.430]

Forms a red-colored double salt, ammonium ferric chromate, NH4Fe(Cr04)2 when added to an aqueous solution of Fe(N03)3 6H20 and CrOs. [Pg.23]

Synonym Neatsfoot Oil Necatorina Nechexane Neutral Ahhonium Pluoride Neutral Anhydrous Calcium Hypochlorite Neutral Lead Acetate Neutral Nicotine Sulfate Neutral Potassium Chromate Neutral Sodium Chromatetanhydrous Neutral Verdigris Nickel Acetate Nickel Acetate Tetrahyorate Nickel Ammonium Sulfate Nickel Ammonium Sulfate Hexahydrate Nickel Bromide Nickel Bromide Trihydrate Nickel Carbonyl Nickel Chloride Nickel Chloride Nickel Cyanide Nickel Iiu Fluoborate Nickel Fluoroborate Solution Nickel Fluoroborate Nickel Formate Nickel Formate Dihyorate Nickel Nitrate Nickel Nitrate Hexahydrate Nickel Sulfate Nickel Tetracarbokyl Nickelous Acetate Nickelous Sulfate Nicotine Nicotine Sulfate Nifos Nitralin Nitram O-Nitraniline P-Nitraniline Nitric Acid Nitric Acid, Aluminum Salt Nitric Acid, Iron (111) Salt Compound Name Oil Neatsfoot Carbon Tetrachloride Neohexane Ammonium Fluoride Calcium Hypochlorite Lead Acetate Nicotine Sulfate Potassium Chromate Sodium Chromate Copper Acetate Nickel Acetate Nickel Acetate Nickel Ammonium Sulfate Nickel Ammonium Sulfate Nickel Bromide Nickel Bromide Nickel Carbonyl Nickel Chloride Nickel Chloride Nickel Cyanide Nickel Fluoroborate Nickel Fluoroborate Nickel Fluoroborate Nickel Formate Nickel Formate Nickel Nitrate Nickel Nitrate Nickel Sulfate Nickel Carbonyl Nickel Acetate Nickel Sulfate Nicotine Nicotine Sulfate Tetraethyl Pyrophosphate Nitralin Ammonium Nitrate 2-Nitroaniline 4-Nitroaniline Nitric Acid Aluminum Nitrate Ferric Nitrate... [Pg.69]

Chlorides, bromides, and iodides can be quantitatively determined by treatment with silver nitrate, and, with suitable precautions, the precipitated halide is washed, dried, and weighed. Chlorides in neutral soln. can be determined by F. Mohr s volumetric process 27 by titration with a standard soln. of silver nitrate with a little potassium chromate or sodium phosphate as indicator. When all the chloride has reacted with the silver nitrate, any further addition of this salt gives a yellow coloration with the phosphate, and a red coloration with the chromate. In J. Volhard s volumetric process, the chloride is treated with an excess of an acidified soln. of silver nitrate of known concentration. The excess of silver nitrate is filtered from the precipitated chloride, and titrated with a standard soln. of ammonium thiocyanate, NH4CN8—a little ferric alum is used as indicator. When the silver nitrate is all converted into thiocyanate AgN03-fNH4CNS=AgCNS +NH4NOS, the blood-red coloration of ferric thiocyanate appears. [Pg.211]

Some chemicals that are reported to stimulate glowing are chromates, molybdates, halides of chromium, manganese, cobalt and copper, and ferric and stannic oxides (.5,10) Chemicals found to be ineffective in retarding afterglow in a limited study were ammonium sulfate and sodium borates (10). ... [Pg.97]

Acid solutions, excluding hydrochloric e.g., phosphoric, sulhiric, most conditions, many organics Neutral solutions, e.g., many non oxidizing salt solutions, chlorides, sulfates Caustic and mild alkalies, excluding ammonium hydroxide Neutral or alkaline solutions, e.g, persulfates, peroxides, chromates Pitting media, acid ferric chloride solutions Freshwater supplies Seawater Steam Furnace gases with incidental sulfur content ... [Pg.2199]

In a back-titration of silver by chloride ions, potassium chromate can be used to indicate the endpoint (Mohr s method) but with potassium thiocyanate as titrant, ammonium iron(III) sulfate ( ferric alum ) is preferred. In the direct titration (Gay-Lussac s method) the location of the turbidimetric endpoint has been improved in detail. ... [Pg.202]

Ammonium chloride Ferric chloride Ferric chloride hexahydrate Potassium ferricyanide Triethylene diamine etchant ingredient, aluminum Ammonium sulfate Sodium chromate Sodium glucoheptonate Sodium nitrate Sodium silicofluoride etchant, ABS Chromic acid etchant, aluminum Ammonium bifluoride... [Pg.5228]

While it is possible to bond to a freshly abraded or cleaned metal surface, chemical treatments are preferred for rendering the metal surface inactive to corrosion over time. For low carbon steel, phosphatising is the recommended pre-bond surface preparation treatment. Stainless steel should be passivated or acid etched, while titanium is usually treated with a hydrofluoric acid pickle. Almninium or magnesium are best treated with a chromate conversion coating. Zinc and cadmium are generally prepared mechanically but a phosphate or chromic acid treatment may be used. Brass and copper may be treated with an ammonium persulphate etch or an acid-ferric chloride etch. [Pg.68]

Ammonium ferric chromate MH4Fe(Ct04)2 7789-08-4 306.871 ted powder IHjO... [Pg.742]