218940-65-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 218940-65-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,8,9,4 and 0 respectively; the second part has 2 digits, 6 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 218940-65:
(8*2)+(7*1)+(6*8)+(5*9)+(4*4)+(3*0)+(2*6)+(1*5)=149
149 % 10 = 9
So 218940-65-9 is a valid CAS Registry Number.
218940-65-9Relevant articles and documents
A 1 - (substituted phenyl) -4 - methyl piperazine of the preparation process
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Paragraph 0066-0069, (2019/07/01)
The invention discloses a 1 - (substituted phenyl) - 4 - methyl piperazine of the preparation process, the process of the invention preparation method to 1 - (substituted phenyl) - piperazine compound A - 1 as a raw material, in the presence of acetic aci
