13021-40-4 Usage
Chemical Properties
violet to black powder
Uses
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.
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.
Check Digit Verification of cas no
The CAS Registry Mumber 13021-40-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,3,0,2 and 1 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 13021-40:
(7*1)+(6*3)+(5*0)+(4*2)+(3*1)+(2*4)+(1*0)=44
44 % 10 = 4
So 13021-40-4 is a valid CAS Registry Number.
InChI:InChI=1/C6H2O6.2K/c7-1-2(8)4(10)6(12)5(11)3(1)9;;/h7-8H;;/q;2*+1/p-2
