81238-57-5 Usage
Uses
Used in Environmental Analysis:
15-CROWN-4 [4-(2,4-DINITROPHENYLAZO)PHENOL] is used as a preconcentration and extraction agent for cobalt from environmental waters, aiding in the accurate measurement and monitoring of this metal in various ecosystems.
Used in Analytical Chemistry:
In the argentometric determination of cyanides, 15-CROWN-4 [4-(2,4-DINITROPHENYLAZO)PHENOL] serves as an indicator, facilitating the detection and quantification of cyanide compounds in samples.
Used in Spectrophotometric Analysis:
15-CROWN-4 [4-(2,4-DINITROPHENYLAZO)PHENOL] is utilized as a spectrophotometric reagent for the determination of copper and molybdenum, enabling precise quantification of these elements in various chemical and industrial applications.
Check Digit Verification of cas no
The CAS Registry Mumber 81238-57-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,2,3 and 8 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 81238-57:
(7*8)+(6*1)+(5*2)+(4*3)+(3*8)+(2*5)+(1*7)=125
125 % 10 = 5
So 81238-57-5 is a valid CAS Registry Number.
InChI:InChI=1/C20H22N4O9/c25-20-14-9-16(21-22-18-2-1-17(23(26)27)11-19(18)24(28)29)10-15(20)13-33-8-6-31-4-3-30-5-7-32-12-14/h1-2,9-11,25H,3-8,12-13H2/b22-21+
81238-57-5Relevant academic research and scientific papers
SYNTHETIC MACROCYCLIC LIGANDS. V. "CROWNED" DINITROPHENYLAZOPHENOLS: DISSOLVING AND COLORATING AGENT OF ALKALI AND ALKALINE EARTH METAL SALTS IN ORGANIC SOLVENTS
Sugihara, Kouichi,Kaneda, Takahiro,Misumi, Soichi
, p. 57 - 61 (2007/10/02)
The complexations of the title compounds with a series of alkali and alkaline earth metal salts were studied under various conditions, e.g., amine, solvent, etc.A solution of azophenol 21 - pyridine in chloroform displayed a noticeable metal-ca
