819821-58-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 819821-58-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 8,1,9,8,2 and 1 respectively; the second part has 2 digits, 5 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 819821-58:
(8*8)+(7*1)+(6*9)+(5*8)+(4*2)+(3*1)+(2*5)+(1*8)=194
194 % 10 = 4
So 819821-58-4 is a valid CAS Registry Number.