109808-63-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 109808-63-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,9,8,0 and 8 respectively; the second part has 2 digits, 6 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 109808-63:
(8*1)+(7*0)+(6*9)+(5*8)+(4*0)+(3*8)+(2*6)+(1*3)=141
141 % 10 = 1
So 109808-63-1 is a valid CAS Registry Number.
109808-63-1Relevant academic research and scientific papers
Preparation method of cetirizine impurity C
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Paragraph 0052; 0058-0060; 0068; 0072; 0075; 0079, (2022/01/10)
The present invention relates to the field of pharmaceutical chemical technology, specifically, to a method for preparing cetirizine impurity C. The method is to prepare the key intermediate 4-{(2-chlorophenyl)phenyl) directly with hydroxyethylpiperazine
