61659-88-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 61659-88-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,1,6,5 and 9 respectively; the second part has 2 digits, 8 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 61659-88:
(7*6)+(6*1)+(5*6)+(4*5)+(3*9)+(2*8)+(1*8)=149
149 % 10 = 9
So 61659-88-9 is a valid CAS Registry Number.