Sodium rhodizonate
Synonym(s):1,2-Dihydroxy-3,4,5,6-tetraoxo-1-cyclohexene disodium salt, Sodium rhodizonate;3,4,5,6-Tetraoxocyclohexene-1,2-diol disodium salt;Rhodizonic acid disodium salt
- CAS NO.:523-21-7
- Empirical Formula: C6Na2O6
- Molecular Weight: 214.04
- MDL number: MFCD00001650
- EINECS: 208-340-3
- SAFETY DATA SHEET (SDS)
- Update Date: 2024-08-13 17:19:14
What is Sodium rhodizonate?
Chemical properties
dark green powder
The Uses of Sodium rhodizonate
Sodium rhodizonate dibasic can be employed as a reactant in the synthesis of:
- Dihydroxyquinone carbonate by cyclocondensation reaction with phosgene.
- Zwitterionic systems by condensation of heteroaryl-boronic acids.
The Uses of Sodium rhodizonate
As a reagent for barium and strontium.
What are the applications of Application
Sodium rhodizonate dibasic is A titration indicator for SO4 and Ba
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.]
Properties of Sodium rhodizonate
Melting point: | 300 °C |
storage temp. | Store at +15°C to +25°C. |
form | Fine Crystalline Powder |
color | Green-gray to dark green |
Water Solubility | Soluble in water. |
Merck | 14,8670 |
BRN | 5181379 |
Stability: | Stable. Incompatible with strong oxidizing agents. |
CAS DataBase Reference | 523-21-7(CAS DataBase Reference) |
Safety information for Sodium rhodizonate
Computed Descriptors for Sodium rhodizonate
InChIKey | SXWPCWBFJXDMAI-UHFFFAOYSA-L |
New Products
6-Bromo 2-Iodo Indole Pyridine 2,4,6-Tricarboxaldehyde Fosfomycin EP impurity D Ivermectin EP Impurity B Rimegepant Impurity 3 (2S,4R)-4-amino-2-methyl-5-phenylpentanoic acid hydrochloride Tubulysin E Tubulysin M Tubulysin I Diethyl Aluminium Cyanide (1.0 M in Toluene) Imeglimin Hydrochloride IH 2-[[(3aR,4S,6R,6aS)-6-Aminotetrahydro-2,2-dimethyl-4H-cyclopenta-1,3-dioxol-4-yl]oxy]ethanol ethanedioate (1R,2S)-2-(3,4-Difluorophenyl)cyclopropanamine 2-[2-[3(S)-3[2-(7-chloro-2-quinolinyl) ethenyl] phenyl-3- hydroxyl propyl] phenyl]-2-propanol Calcium Sodium Phosphosilicate IH 2-(1-(Mercaptomethyl) cyclopropyl) acetonitrile 1-(4-Aminophenyl)-3-morpholino-5,6-dihydropyridin-2(1H)-one (S)-Methyl 2-((tert-butoxycarbonyl)amino)-3-((S)-2-oxopyrrolidin-3-yl)propanoate 1-(4-Chlorophenyl)piperidin-2-one Methyl 4-amino-3-(piperidin-1-yl)benzoate 2-(2,4-Dibutoxyphenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane 3,6-Bis(4-iodophenyl)-2,5-dihydropyrrolo[3,4-c]pyrrole-1,4-dione 6-Hydroxyisoquinoline 3-Fluro-6,7-dihydro-5H-Pyrrolo [3,4-b]pyridine dihydro chlorideRelated products of tetrahydrofuran
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