891721-13-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 891721-13-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 8,9,1,7,2 and 1 respectively; the second part has 2 digits, 1 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 891721-13:
(8*8)+(7*9)+(6*1)+(5*7)+(4*2)+(3*1)+(2*1)+(1*3)=184
184 % 10 = 4
So 891721-13-4 is a valid CAS Registry Number.