6538-16-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 6538-16-5 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 6 respectively.
Calculate Digit Verification of CAS Registry Number 6538-16:
(6*6)+(5*5)+(4*3)+(3*8)+(2*1)+(1*6)=105
105 % 10 = 5
So 6538-16-5 is a valid CAS Registry Number.