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13600-98-1O=N[O-].O=N[O-].O=N[O-].O=N[O-].O=N[O-].O=N[O-].[Co].[Na+].[Na+].[Na+]13600-98-1化学的特性SODIUM COBALTINITRITE is deep yellow to brown crystalline powder
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使用SODIUM COBALTINITRITE is used in the detection Potassium.
製造方法Sodiumhexanitrocobaltate(III) ("sodiumcobaltinitrite") Na3Co(N02)6 is a well-known orange solid which precipitates potassium ions from aqueous solution as K3Co(NO2)6. It is prepared by blowing air through a mixture of cobalt(II) nitrate and sodium nitrite solutions in the presence of acetic acid: 2[Co(H20)6]2+ +12NO2- +2CH3COOH + 1/2O2 → 2[Co(NO)2)6]3- +2CH3COO-+ 13H2Oafter filtration of any precipitated potassium or ammonium salts, the sodium salt is precipitated by the addition of ethanol.
純化方法Dissolve the salt (ca 60g) in H2O (300mL), filter to obtain a clear solution, add 96% EtOH (250mL) with vigorous stirring. Allow the precipitate to settle for 2hours, filter it off, wash it with EtOH (4 x 25mL), twice with Et2O and dry it in air [Glemser in Handbook of Preparative Inorganic Chemistry (Ed. Brauer) Academic Press Vol II p 1541 1965]. It forms yellow to brown crystals which are very soluble in H2O, are decomposed by acid and form an insoluble K salt. Used for estimating potassium.
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