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| | SODIUM COBALTINITRITE Basic information |
| | SODIUM COBALTINITRITE Chemical Properties |
| Melting point | 220 °C (dec.)(lit.) | | storage temp. | Store below +30°C. | | solubility | 720g/l | | form | Solid | | color | Orange to orange-brown | | Odor | Odorless | | PH | 5 (100g/l, H2O, 20℃) | | Water Solubility | Soluble in water | | Merck | 13,8677 | | Stability: | Stable. Contact with conbustible material may cause fire. Incompatible with strong acids, organic materials, amines. | | CAS DataBase Reference | 13600-98-1(CAS DataBase Reference) |
| Hazard Codes | O,Xn | | Risk Statements | 8-36/37/38-42/43-40 | | Safety Statements | 17-26-36/37 | | RIDADR | UN 1479 5.1/PG 2 | | WGK Germany | 3 | | RTECS | GF9480000 | | HazardClass | 5.1 | | PackingGroup | II | | HS Code | 28429090 |
| | SODIUM COBALTINITRITE Usage And Synthesis |
| Chemical Properties | SODIUM COBALTINITRITE is deep yellow to brown crystalline powder
| | Uses | Nitrosation reagent for the conversion of aromatic amines to 1,3-diaryltriazenes with excellent yield.1 | | Uses | SODIUM COBALTINITRITE is used in the detection Potassium.
| | Uses | For the detection of potassium with which it forms a slightly soluble compound. | | Preparation | 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-+ 13H2O
after filtration of any precipitated potassium or ammonium salts, the sodium salt is precipitated
by the addition of ethanol. | | Purification Methods | 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. |
| | SODIUM COBALTINITRITE Preparation Products And Raw materials |
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