664348-89-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 664348-89-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,6,4,3,4 and 8 respectively; the second part has 2 digits, 8 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 664348-89:
(8*6)+(7*6)+(6*4)+(5*3)+(4*4)+(3*8)+(2*8)+(1*9)=194
194 % 10 = 4
So 664348-89-4 is a valid CAS Registry Number.