439-63-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 439-63-4 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 4,3 and 9 respectively; the second part has 2 digits, 6 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 439-63:
(5*4)+(4*3)+(3*9)+(2*6)+(1*3)=74
74 % 10 = 4
So 439-63-4 is a valid CAS Registry Number.