637-38-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 637-38-7 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 7 respectively; the second part has 2 digits, 3 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 637-38:
(5*6)+(4*3)+(3*7)+(2*3)+(1*8)=77
77 % 10 = 7
So 637-38-7 is a valid CAS Registry Number.