638-15-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 638-15-3 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 6,3 and 8 respectively; the second part has 2 digits, 1 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 638-15:
(5*6)+(4*3)+(3*8)+(2*1)+(1*5)=73
73 % 10 = 3
So 638-15-3 is a valid CAS Registry Number.