6538-12-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 6538-12-1 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 6,5,3 and 8 respectively; the second part has 2 digits, 1 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 6538-12:
(6*6)+(5*5)+(4*3)+(3*8)+(2*1)+(1*2)=101
101 % 10 = 1
So 6538-12-1 is a valid CAS Registry Number.