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iodium Fluoride 8565
<br /> erating hol. CrH,NaO; mol wt 68.06. C 35.291%, H 7.41%. Na
<br /> 33.79%O 23.51%.
<br /> molds White or yellowish. hygroscopic powder. Dec on expo-
<br /> ds. 14, sure to air and becomes darker on keeping. Dec by water
<br /> into NaOH and alcohol; sol without decompn in abs alc.
<br /> te; bi Keep tightly closed, protected from light and in a cool place.
<br /> ,9.707., 8561. Sodium Ethyl Sulfate. Sodium sulfovinam C Hy-
<br /> m Na, NaO,S;mol wt 148.11. C 16.227., H 3.40%, Na 15.52,O
<br /> Mill- 43.21%, S 21.65%. NaCrHSSO,.
<br /> +itchen Monohydrate,white,very hygroscopic crystals. Sol in 0.7
<br /> eyes A, part water, in alcohol. Keep well closed.
<br /> N. K. use: In organic syntheses.
<br /> . 1975)5) 8562. Sodium Ferricyanide. Trisadium hexakis(cya-
<br /> liques- no-C)f<rrom(3-); sodium hexacyanoferrate(lll). CeFe-
<br /> imdal. NcNas;mol wt 280.91. C 25.65%w Fe 19.88%.N 29.92%.Na
<br /> cosity: 24.56%. Na,Fe(CN)s.
<br /> ingat Monohydrate, ruby-red, deliquesc crystals. Sol in 5.5
<br /> dee at parts cold water, 1.5 pans boiling water. Keep well closed.
<br /> 'tr. A 8563. Sodium Ferrocyanide. Trimsodium hesakis(cya-
<br /> at 2p. no-C)fermte(4-);sodium heracyanofemte(H); yellow prus.
<br /> 9%;at state of soda; sodium prussiate yellow. C,FeN,Nae;mol wt
<br /> .oln at 303.91. C 23.717 Fe 18.38%. N 27.65%,Na 30.26%. Na,
<br /> is heat Fe(CN)s. Review of properties, chemistry and syntheses:
<br /> pH Of The Chemistry of Ferrocyanides, American Cyanamid Co.
<br /> (Beacon Press, New York, 1953) 112 pp.
<br /> -r syn- Decahydrate,pale yellow,monoclinic,slightly efflorescent
<br /> king of crystals. Steady dehydration Occurs above W. Becomes
<br /> -S, res- anhydr at 81.50. Dec 435', forming sodium cyanide, iron,
<br /> chro- carbon,and nitrogen. Soly in water at P: 10.2%(caled as
<br /> eoro- the anhydr salt);at IT: 14.7%;at 25: 17.6%:at 53': 28.1%;
<br /> tri- at 85': 3976;at 96.60: 39.7%. Practically insol in most or.
<br /> claim; ganic solvents.
<br /> s and Use: Addition of sodium ferrocyanide solos to slightly
<br /> Ivanta acidic Solas of iron salts causes precipitation of insol Prus-
<br /> im.- sign blue(ferric ferrocyanide),Fes[Fe(CN)s]s. Alkaline spins
<br /> yield sol Prussian blue, NeFe[Fe(CN)s]. Sodium ferrocya-
<br /> nide forms gels with heavy metals in general. Used in ore
<br /> anidct flotation. In photography for bleaching, toning,and fixing. -
<br /> 827. To prevent caking of rock salt and foods. Additive to pick.
<br /> ling baths. Peptizing agent in rubber. Are stabilizer in
<br /> welding rod coatings. Emulsion polymerization catalyst.
<br /> Toxicity: Because of strong chemical bondage between the
<br /> cyanide groups and the iron,ferrocyanides have a low order
<br /> n sat. of toxicity. Caution: Do not mix with hot or coned acids
<br /> .11%. and do not expose solns to sunlight for any length of time to
<br /> nS,Os avoid generation of hydrogen cyanide. Waste ferrocyanides
<br /> Bast, in streams and lakes should not exceed 2 ppm because irra.
<br /> 2,170 diated solus become toxic to fish. G. E. Burdick, M. Lip.
<br /> .hcum, C.A. 44, 10939f(1950). 3
<br /> 6564. Sodium Fluoborate. Sodium tetrafluoroborate;so.
<br /> dium borofluoride. BFeNa; mol wt 109.82. B 9,95%, F
<br /> 69.21%. Na 20.94%. NaBF,. Prepd according to the equa-
<br /> tion 2H,BOs + SHF + NarCOs - 2NaBF4 + 7Ht0 +
<br /> CO,: Balz. Wilke-Dtfrfurt, Z Anorg. Al/gem. Chem. 159,
<br /> 197 (1927); Kwasmk in Handbook of Preparative Inorganic
<br /> Chemistry, vol. 1, G. Brauer, Ed. (Academic Press. New
<br /> 'stals. York. 2nd ad., 1963) p 222.
<br /> -,,stn Orthorhombic,stout rectangular prisms dia 2.47. mp 384'
<br /> .a290e (slight decompn). Does not etch glass when absolutely dry.
<br /> 1.3976. Soly in water(g/100 ml): 108 (26% 210(1009. Sparingly
<br /> sol in alcohol. Aq solns have a bitter taste and arc acid to
<br /> litmus.
<br /> lbrnz- USE: Fluorinating agent,see Lawton, Levy,J. Am. Chem.
<br /> suite- Sac 77,6083 (1955).
<br /> qj�a 8565. Sodium Fluoride. Chemifluor, DuraphaG Fluoros;
<br /> 4anuh Luride-SF; Villiaumite; FlOrocid; Flura•Drops; KarJdium;
<br /> ra Oil Lemoflur;Ossalin;Ossm;Osteonuor;Zymafluor. FNa;mol
<br /> lyes- wt 42.00. F 45.24%, Na 54.75%. Nal'. Prepd by fusing
<br /> .anto); cryolite with NeOH; by adding equiv amounts of NaOH or
<br /> Kar- NarCO,to 4096 HF(precipitation is instantaneous and crys-
<br /> tal size depends on pH, but too much HF yields sodium
<br /> ,pe in bifluoride. NaHFr): MiBler. Chem.-Ztg. 52, 5 (1928);
<br /> Kwasnik in Handbook of Preparative Inorganic Chemistry,
<br /> grits- vol. 1,G. Brauer.Ed.(Academic Press.New York.2nd ed.,
<br /> 1963)pp 235.236. Technical grades art 90%and 95%NaF,
<br /> light (37 cu in/Ib)and den. (23 cu in/lb), and 98%. The
<br /> alto- impurities are mainly sodium and aluminum fluosilicates.
<br /> index before using this section. Page 1361
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