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392340

Sigma-Aldrich

Potassium rhodizonate

technical grade, 85%

Sinonimo/i:

3,4,5,6-Tetraoxocyclohexene-1,2-diol dipotassium salt, Rhodizonic acid potassium salt

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About This Item

Formula condensata:
C6O6K2
Numero CAS:
13021-40-4
Peso molecolare:
246.26
Numero CE:
235-881-2
Numero MDL:
MFCD00001649
Codice UNSPSC:
12352100
ID PubChem:
24864445
NACRES:
NA.22

Grado

technical grade

Saggio

85%

Forma fisica

powder

Punto di fusione

>300 °C (lit.)

Stringa SMILE

[K+].[K+].[O-]C1=C([O-])C(=O)C(=O)C(=O)C1=O

InChI

1S/C6H2O6.2K/c7-1-2(8)4(10)6(12)5(11)3(1)9;;/h7-8H;;/q;2*+1/p-2
NEWIILAQDSMNML-UHFFFAOYSA-L

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Descrizione generale

Potassium rhodizonate (3,4,5,6-Tetraoxocyclohexene-1,2-diol dipotassium salt, Rhodizonic acid potassium salt), a benzoquinone derivative, is the potassium salt of rhodizonic acid. Its crystalline structure has been reported and it exhibits space group Fddd. Rhodizonate dianion undergoes various thermal and photochemical reactions with various oxidizing reagents in aqueous solution.

Applicazioni

Potassium rhodizonate is suitable reagent for the preparation of staining solution used in the rhodizonate test for the detection of lead. It is suitable reagent used in the preparation of barium, thallium, ammonium and silver salts rhodizonic acid by metathesis in aqueous solution.
It may be used in the following studies:
  • To cocrystallize plutonium and radium from urine in the plutonium and radium assay of urine.
  • As a dye in the spectrophotometric determination of sulfate ion.
  • To determine the acid dissociation constants of rhodizonic acid by pH potentiometric titration of potassium rhodizonate with standardized HCl.
  • As a staining agent for plagioclase in the petrographic study.

Codice della classe di stoccaggio

11 - Combustible Solids

Classe di pericolosità dell'acqua (WGK)

WGK 3

Punto d’infiammabilità (°F)

Not applicable

Punto d’infiammabilità (°C)

Not applicable

Dispositivi di protezione individuale

Eyeshields, Gloves, type N95 (US)

Certificati d'analisi (COA)

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Fatma Gorbel et al.
Comptes rendus biologies, 325(9), 927-940 (2002-12-17)
This study deals with the impact of chronic exposure to lead on male and female fertility in rats. Male and female rats (3 months old) were fed on commercial tablets (SICO, Sfax). For drinking, some rats were given distilled water
Analysis of sulfate in complex carbohydrates.
L J Silvestri et al.
Analytical biochemistry, 123(2), 303-309 (1982-07-01)
Dipotassium rhodizonate.
Cowan JA and Howard JAK.
Acta Crystallographica Section E, Structure Reports Online, 60(4), 511-513 (2004)
Refined techniques for staining plagioclase and alkali feldspars in thin section.
Houghton HF
Journal of Sedimentary Research, 50(2), 629-631 (1980)
W Marty et al.
International journal of legal medicine, 116(1), 1-4 (2002-04-02)
The histological staining technique using rhodizonate is also effective for the determination of the firing distance by examining the distribution and intensity of the staining reaction. The differentiation between absolute close-range shots and long-range shots is generally possible without any
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