803-97-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 803-97-4 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 8,0 and 3 respectively; the second part has 2 digits, 9 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 803-97:
(5*8)+(4*0)+(3*3)+(2*9)+(1*7)=74
74 % 10 = 4
So 803-97-4 is a valid CAS Registry Number.