158-97-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 158-97-4 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 1,5 and 8 respectively; the second part has 2 digits, 9 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 158-97:
(5*1)+(4*5)+(3*8)+(2*9)+(1*7)=74
74 % 10 = 4
So 158-97-4 is a valid CAS Registry Number.