| Identification | More | [Name]
Sodium rhodizonate | [CAS]
523-21-7 | [Synonyms]
1,2-DIHYDROXY-3,4,5,6-TETRAOXO-1-CYCLOHEXENE DISODIUM SALT
3,4,5,6-TETRAOXOCYCLOHEXENE-1,2-DIOL DISODIUM SALT
5,6-DIHYDROXY-5-CYCLOHEXENE-1,2,3,4-TETRONE DISODIUM SALT
DISODIUM RHODIZONATE
RHODIZONIC ACID, DISODIUM DERIVATIVE
RHODIZONIC ACID DISODIUM SALT
RHODIZONIC ACID SODIUM SALT
SODIUM RHODIZONATE
SODIUM RHODIZONATE DIBASIC
2,3,4-tetrone,5,6-dihydroxy-5-cyclohexene-disodiumsalt
5-Cyclohexene-1,2,3,4-tetrone,5,6-dihydroxy-,disodiumsalt
Sodiumrhodizmate
1,2-Dihydroxy-3,4,5,6-tetraoxocyclohexene disodium salt
disodium 3,4,5,6-tetraoxocyclohex-1-en-1,2-ylene dioxide
RHODIZONIC ACID DISODIUM SALT 97%
SodiumRhodizonateGr-(RhodizonicAcidSodiumSalt)
SodiumRhodizonateGr
SODIUM RHODIAZONATE
SODIUM RHODOZINATE extrapure AR
3,4,5,6-Tetraoxocyclohexene-1,2-diol disodium salt, Rhodizonic acid disodium salt | [EINECS(EC#)]
208-340-3 | [Molecular Formula]
C6Na2O6 | [MDL Number]
MFCD00001650 | [Molecular Weight]
214.04 | [MOL File]
523-21-7.mol |
| Chemical Properties | Back Directory | [Appearance]
dark green powder | [Melting point ]
300 °C
| [bulk density]
620kg/m3 | [storage temp. ]
Store at +15°C to +25°C. | [form ]
Fine Crystalline Powder | [color ]
Green-gray to dark green | [Stability:]
Stable. Incompatible with strong oxidizing agents. | [Water Solubility ]
Soluble in water. | [Merck ]
14,8670 | [BRN ]
5181379 | [InChI]
InChI=1S/C6H2O6.2Na/c7-1-2(8)4(10)6(12)5(11)3(1)9;;/h7-8H;;/q;2*+1/p-2 | [InChIKey]
SXWPCWBFJXDMAI-UHFFFAOYSA-L | [SMILES]
C1(=O)C(=O)C(=C([O-])C(=O)C1=O)[O-].[Na+].[Na+] | [CAS DataBase Reference]
523-21-7(CAS DataBase Reference) |
| Safety Data | Back Directory | [Safety Statements ]
S24/25:Avoid contact with skin and eyes . | [WGK Germany ]
3 | [HS Code ]
29144090 | [Storage Class]
11 - Combustible Solids |
| Hazard Information | Back Directory | [Chemical Properties]
dark green powder | [Uses]
As a reagent for barium and strontium. | [Purification Methods]
The free acid is obtained by acidifiying and extracting with Et2O, drying (MgSO4), filtering, evaporating and distilling in a vacuum (b 155-160o/14mm). The free acid solidifies on cooling, and the colourless crystals can be recrystallised from tetrahydrofuran/pet ether or *C6H6. It forms a dihydrate m 130-140o. The pure di Na salt is formed by dissolving the acid in 2 equivalents of NaOH and evaporating in a vacuum. It forms violet crystals which give an orange solution in H2O that is unstable for extended periods even at 0o, and should be prepared freshly before use. Salts of rhodizonic acid cannot be purified by recrystallisation without great loss due to conversion to crotonate, so that the original material must be prepared anew if pure salt is required. It can be washed with NaOAc solution, then EtOH, to remove excess NaOAc, dried under vacuum and stored in the dark. [UV and tautomerism: Schwarzenbach & Suter Helv Chim Acta 24 617 1941, Polarography: Preisler & Berger J Am Chem Soc 64 67 1942, Souchay & Taibouet J Chim Phys 49 C108 1952, Beilstein 8 H 535, 8 II 572, 8 III 4214, 8 IV 3609.] |
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