91340-21-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 91340-21-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,1,3,4 and 0 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 91340-21:
(7*9)+(6*1)+(5*3)+(4*4)+(3*0)+(2*2)+(1*1)=105
105 % 10 = 5
So 91340-21-5 is a valid CAS Registry Number.