91371-20-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 91371-20-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,1,3,7 and 1 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 91371-20:
(7*9)+(6*1)+(5*3)+(4*7)+(3*1)+(2*2)+(1*0)=119
119 % 10 = 9
So 91371-20-9 is a valid CAS Registry Number.