128651-56-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 128651-56-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,8,6,5 and 1 respectively; the second part has 2 digits, 5 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 128651-56:
(8*1)+(7*2)+(6*8)+(5*6)+(4*5)+(3*1)+(2*5)+(1*6)=139
139 % 10 = 9
So 128651-56-9 is a valid CAS Registry Number.
128651-56-9Relevant academic research and scientific papers
Photochemical formylation of carbazole and diphenylamine
Chowdhury,Saha,Podder
, p. 405 - 406 (2007/10/02)
Carbazole (1) and diphenylamine (7) undergo photo-chemical formylation in chloroform solution to furnish the corresponding formyl derivatives 2, 3 and 8, 9 respectively. The reaction has been successfully extended to 1-methylcarbazole (4) to yield formyl derivatives 5 and 6.
