91641-16-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 91641-16-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,1,6,4 and 1 respectively; the second part has 2 digits, 1 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 91641-16:
(7*9)+(6*1)+(5*6)+(4*4)+(3*1)+(2*1)+(1*6)=126
126 % 10 = 6
So 91641-16-6 is a valid CAS Registry Number.