91421-15-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 91421-15-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,1,4,2 and 1 respectively; the second part has 2 digits, 1 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 91421-15:
(7*9)+(6*1)+(5*4)+(4*2)+(3*1)+(2*1)+(1*5)=107
107 % 10 = 7
So 91421-15-7 is a valid CAS Registry Number.