128342-65-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 128342-65-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,8,3,4 and 2 respectively; the second part has 2 digits, 6 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 128342-65:
(8*1)+(7*2)+(6*8)+(5*3)+(4*4)+(3*2)+(2*6)+(1*5)=124
124 % 10 = 4
So 128342-65-4 is a valid CAS Registry Number.