392340
Potassium rhodizonate
technical grade, 85%
Synonym(s):
3,4,5,6-Tetraoxocyclohexene-1,2-diol dipotassium salt, Rhodizonic acid potassium salt
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About This Item
Linear Formula:
C6O6K2
CAS Number:
Molecular Weight:
246.26
NACRES:
NA.22
PubChem Substance ID:
UNSPSC Code:
12352100
EC Number:
235-881-2
MDL number:
Assay:
85%
Form:
powder
InChI key
NEWIILAQDSMNML-UHFFFAOYSA-L
InChI
1S/C6H2O6.2K/c7-1-2(8)4(10)6(12)5(11)3(1)9;;/h7-8H;;/q;2*+1/p-2
SMILES string
[K+].[K+].[O-]C1=C([O-])C(=O)C(=O)C(=O)C1=O
grade
technical grade
assay
85%
form
powder
mp
>300 °C (lit.)
General description
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.
Application
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:
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.
Storage Class
11 - Combustible Solids
wgk
WGK 3
flash_point_f
Not applicable
flash_point_c
Not applicable
ppe
Eyeshields, Gloves, type N95 (US)
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Harun Tugcu et al.
The American journal of forensic medicine and pathology, 27(4), 296-299 (2006-11-30)
It is important to investigate the clothing, as well as the body, to determine the range of fire of entry wounds in firearm injuries. Clothing can affect the amount of gunshot residues (GSR) reaching the body and their distribution. The
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
Analysis of sulfate in complex carbohydrates.
L J Silvestri et al.
Analytical biochemistry, 123(2), 303-309 (1982-07-01)
Radiochemical determination of radium in urine.
Weiss HV and Lai MG.
Analytical Chemistry, 33(1), 39-41 (1961)
Refined techniques for staining plagioclase and alkali feldspars in thin section.
Houghton HF
Journal of Sedimentary Research, 50(2), 629-631 (1980)
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