74243-89-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 74243-89-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,4,2,4 and 3 respectively; the second part has 2 digits, 8 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 74243-89:
(7*7)+(6*4)+(5*2)+(4*4)+(3*3)+(2*8)+(1*9)=133
133 % 10 = 3
So 74243-89-3 is a valid CAS Registry Number.