491-47-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 491-47-4 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 4,9 and 1 respectively; the second part has 2 digits, 4 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 491-47:
(5*4)+(4*9)+(3*1)+(2*4)+(1*7)=74
74 % 10 = 4
So 491-47-4 is a valid CAS Registry Number.