128913-43-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 128913-43-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,8,9,1 and 3 respectively; the second part has 2 digits, 4 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 128913-43:
(8*1)+(7*2)+(6*8)+(5*9)+(4*1)+(3*3)+(2*4)+(1*3)=139
139 % 10 = 9
So 128913-43-9 is a valid CAS Registry Number.