Zinc acetate fluoride

Also, it can be precipitated by adding a solution of sodium fluoride to that of zinc acetate ... 

FOSFATO AMONICO DIBASICO (Spanish) (7783-28-0) Contact with air slowly forms anhydrous ammonia. Contact with caustics forms anhydrous ammonia gas. Violent reaction with strong oxidizers, potassium chlorate, strong bases. Reacts with antimony(V) penta-fluoride, lead diacetate, magnesium, silver nitrate, zinc acetate. 

Vegetable oils Vinyl benzene Vinyl benzoate Vinyl chloride Vinyl fluoride Vinylidene chloride Water, cold Water, hot (1050LF) White oil White pine oil Wood oil Xenon Xylene Zinc acetate Zinc chloride Zinc chromate Zinc nitrate Zinc oxide Zinc sulfate Zinc sulfide Zirconium nitrate... 

OTC pharmaceutical additive Aluminum chlorohydrex PEG Stannous fluoride Zinc acetate OTC pharmaceutical ingredient, active Selenium disulfide OTC pharmaceuticals... 

Trichlorophenol Zinc acetate Zinc fluoride Zinc naphthenate Zinc sulfate preservative, wood agric. packaging Mineral spirits Paraffin Pentachlorophenol Sodium pentachlorophenate Zinc petroleum sulfonate... 

Valentinite, see Antimony(III) oxide Verdigris, see Copper acetate hydrate Vermillion, see Mercury(II) sulflde Villiaumite, see Sodium fluoride Vitamin B3, see Calcium (+)pantothenate Washing soda, see Sodium carbonate 10-water Whitlockite, see Calcium phosphate Willemite, see Zinc silicate(4—)... 

Acetic anhydride adds to acetaldehyde in the presence of dilute acid to form ethyUdene diacetate [542-10-9], boron fluoride also catalyzes the reaction (78). Ethyfldene diacetate decomposes to the anhydride and aldehyde at temperatures of 220—268°C and initial pressures of 14.6—21.3 kPa (110—160 mm Hg) (79), or upon heating to 150°C in the presence of a zinc chloride catalyst (80). Acetone (qv) [67-64-1] has been prepared in 90% yield by heating an aqueous solution of acetaldehyde to 410°C in the presence of a catalyst (81). Active methylene groups condense acetaldehyde. The reaction of isobutfyene/715-11-7] and aqueous solutions of acetaldehyde in the presence of 1—2% sulfuric acid yields alkyl-y -dioxanes 2,4,4,6-tetramethyl-y -dioxane [5182-37-6] is produced in yields up to 90% (82). 

Brauer, Stansbury Flowers (1986) modified these cements in several ways. The addition of various adds - acetic, propionic, benzoic etc. -accelerated the set. The use of zinc oxide powders coated with propionic add improved mixing, accelerated set, reduced brittleness and increased compressive strength from 63 to a maximum of 72 MPa. The addition of plasticizing agents such as zinc undecenylate yielded flexible materials. Incorporation of metal powders had a deleterious effect and greatly increased the brittleness of these cements. The addition of fluorides was not very successful, for fluoride release was not sustained. 

The three-dimensional structure of insulin remained recalcitrant in spite of the knowledge of its primary sequence. The early crystals had been found by Scott (1936) to contain zinc which could be replaced by other divalent metals. The zinc atom is not heavy enough to be unambiguously distinguishable. Eventually it proved possible to introduce uranyl acetate and uranyl fluoride into the insulin molecule and to obtain the three-dimensional structure, first at 2.8 A resolution and then at 1.9 A (see Blundell, Dodson, Hodgkin, and Mercola, 1972). 

Group transfer polymerization (GTP) requires either a nucleophilic or Lewis acid catalyst. Bifluoride (HF2) and fluoride ions, supplied by soluble reagents such as tris(dimethylamino)-sulfonium bifluoride, [(CH3)2N]3SHF2, and (w-C NF, are the most effective nucleophilic catalysts, although other nucleophiles (CN , acetate, p-nitrophenolate) are also useful. Zinc... 

Rubidium metal alloys with the other alkali metals, the alkaline-earth metals, antimony, bismuth, gold, and mercury. Rubidium forms double halide salts with antimony, bismuth, cadmium, cobalt, copper, iron, lead, manganese, mercury, nickel, thorium, and zinc. These complexes are generally water insoluble and not hygroscopic. The soluble rubidium compounds are acetate, bromide, carbonate, chloride, chromate, fluoride, formate, hydroxide, iodide,... 

Zinc amalgam, or electrochemical reduction of porphyrinatoniobium(V) oxide acetates led to [NbIVOL] (L = OEP, TPP, TPTP).566 The [NbOLF]- anions have been obtained by controlled potential electrolysis of (i) the corresponding Nbv oxo acetate in the presence of PFg and (ii) the appropriate Mr oxo fluoride. Reduction by zinc amalgam of [M)LX3] (X = Q, Br) gave [NbtvLX2] 327 the ESR spectra of the six-coordinate complexes in frozen THF solution are consistent with trans coordination. 

Urea / 2.535 Urea Resins / 2.538 Valium / 2.539 Vinyl Acetate / 2.540 Vinyl Chloride / 2.542 Vinyl Esters / 2.544 Vinyl Ethers / 2.545 Vinyl Fluoride / 2.546 Vinylidene Chloride / 2.547 Vinylidene Fluoride / 2.548 Water Gas / 2.549 Wax / 2.550 Wood Chemicals / 2.552 Xenon / 2.556 Xylenes / 2.557 Zinc Chromate / 2.561 Zinc Oxide / 2.562 Zinc Sulfate / 2.564 Zinc Sulfide / 2.565... 

Substitution of the acetate group at the C-3 position of the /3-sultam 105 can occur by reaction with silyl enol ethers in the presence of zinc iodide or zinc chloride. When the diazo compound is used, after desilylation with tetrabutyl-ammonium fluoride (TBAF), photochemical cyclization gives the bicyclic /3-sultam 106 as a mixture of two cis/ fra -diastereoisomers. When silyl enol ethers derived from cyclic ketones are used, the substitution product is stabilized by a retro-Michael-type reaction leading to open-chained sulfonamides 107 (Scheme 31) <1997LA1261>. 

Assay Dissolve about 1 g of sample, accurately weighed, in 50 mL of water, add 50.0 mL of 0.05 M disodium EDTA and 20 mL of pH 4.5 buffer solution (77.1 g of ammonium acetate and 57 mL of glacial acetic acid in 1000 mL of aqueous solution), and boil gently for 5 min. Cool, and add 50 mL of alcohol and 2 mL of dithizone TS. Back titrate with 0.05 M zinc sulfate to a bright rose-pink color. Perform a blank determination (see General Provisions), and make any necessary correction. The milliliters of 0.05 M disodium EDTA consumed is equivalent to 50 minus the milliliters of 0.05 M zinc sulfate used. Each milliliter of 0.05 M disodium EDTA is equivalent to 23.72 mg of A1K(S04)2T2H20. Ammonium Salts Add 1 g of sample to 10 mL of 1 N sodium hydroxide in a small beaker, and heat on a steam bath for 1 min. The odor of ammonia is not perceptible. Fluoride Determine as directed in Method V under Fluoride Limit Test, Appendix IIIB. 

Zinc ferrite, Zn(Fe02)2 or Zn0.Fe203, occurs in nature as frank-linite (see p. 14) and may be artificially prepared in the laboratory in a variety of ways,5 such as by fusing an intimate mixture of the sulphates of sodium, zinc, and ferric iron at cherry-red heat, and extracting the melt with boiling water. Any basic zinc sulphate is removed with dilute acetic acid. Crystalline zinc ferrite also results when zinc chloride is heated in moist air with ferric chloride or haematite. The zinc chloride may be replaced by the corresponding fluoride.6... 

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