128209-91-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 128209-91-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,8,2,0 and 9 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 128209-91:
(8*1)+(7*2)+(6*8)+(5*2)+(4*0)+(3*9)+(2*9)+(1*1)=126
126 % 10 = 6
So 128209-91-6 is a valid CAS Registry Number.