16684-65-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 16684-65-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,6,6,8 and 4 respectively; the second part has 2 digits, 6 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 16684-65:
(7*1)+(6*6)+(5*6)+(4*8)+(3*4)+(2*6)+(1*5)=134
134 % 10 = 4
So 16684-65-4 is a valid CAS Registry Number.