6813-89-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 6813-89-4 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 6,8,1 and 3 respectively; the second part has 2 digits, 8 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 6813-89:
(6*6)+(5*8)+(4*1)+(3*3)+(2*8)+(1*9)=114
114 % 10 = 4
So 6813-89-4 is a valid CAS Registry Number.