497-91-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 497-91-6 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 7 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 497-91:
(5*4)+(4*9)+(3*7)+(2*9)+(1*1)=96
96 % 10 = 6
So 497-91-6 is a valid CAS Registry Number.