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99233-28-0

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99233-28-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 99233-28-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,9,2,3 and 3 respectively; the second part has 2 digits, 2 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 99233-28:
(7*9)+(6*9)+(5*2)+(4*3)+(3*3)+(2*2)+(1*8)=160
160 % 10 = 0
So 99233-28-0 is a valid CAS Registry Number.

99233-28-0Downstream Products

99233-28-0Relevant articles and documents

A New Synthetic Route to 6,7-Dichloro-5,8-quinoxalinedione and Synthesis of Its Derivatives

Han, Gyoonhee,Shin, Kye Jung,Kim, Dong Chan,Yoo, Kyung Ho,Kim, Dong Jin,Park, Sang Woo

, p. 2495 - 2502 (2007/10/03)

6,7-Dichloro-5,8-quinoxalinedione (2), an analogue of Dichlone, was prepared from 4-aminophenol (3) in 27percent overall yield in 8 steps via chloroxidation of the sulfuric acid salt of 8-amino-5-quinoxalinol (9) as a key step.And two derivatives, 6-chloro-5-hydroxypyrazinophenazine (10) and pyridoimidazoquinoxaline-6,11-dione (11), were prepared by reaction of 2 with 1,2-phenylenediamine and 2-aminopyridine in 79percent and 46percent yields, respectively.

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