83404-71-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 83404-71-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,3,4,0 and 4 respectively; the second part has 2 digits, 7 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 83404-71:
(7*8)+(6*3)+(5*4)+(4*0)+(3*4)+(2*7)+(1*1)=121
121 % 10 = 1
So 83404-71-1 is a valid CAS Registry Number.