3289-20-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 3289-20-1 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 3,2,8 and 9 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 3289-20:
(6*3)+(5*2)+(4*8)+(3*9)+(2*2)+(1*0)=91
91 % 10 = 1
So 3289-20-1 is a valid CAS Registry Number.