83421-59-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 83421-59-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,3,4,2 and 1 respectively; the second part has 2 digits, 5 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 83421-59:
(7*8)+(6*3)+(5*4)+(4*2)+(3*1)+(2*5)+(1*9)=124
124 % 10 = 4
So 83421-59-4 is a valid CAS Registry Number.