78989-68-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 78989-68-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,8,9,8 and 9 respectively; the second part has 2 digits, 6 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 78989-68:
(7*7)+(6*8)+(5*9)+(4*8)+(3*9)+(2*6)+(1*8)=221
221 % 10 = 1
So 78989-68-1 is a valid CAS Registry Number.