67421-16-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 67421-16-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,7,4,2 and 1 respectively; the second part has 2 digits, 1 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 67421-16:
(7*6)+(6*7)+(5*4)+(4*2)+(3*1)+(2*1)+(1*6)=123
123 % 10 = 3
So 67421-16-3 is a valid CAS Registry Number.