74157-63-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 74157-63-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,4,1,5 and 7 respectively; the second part has 2 digits, 6 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 74157-63:
(7*7)+(6*4)+(5*1)+(4*5)+(3*7)+(2*6)+(1*3)=134
134 % 10 = 4
So 74157-63-4 is a valid CAS Registry Number.