649561-83-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 649561-83-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,4,9,5,6 and 1 respectively; the second part has 2 digits, 8 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 649561-83:
(8*6)+(7*4)+(6*9)+(5*5)+(4*6)+(3*1)+(2*8)+(1*3)=201
201 % 10 = 1
So 649561-83-1 is a valid CAS Registry Number.