67657-73-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 67657-73-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,7,6,5 and 7 respectively; the second part has 2 digits, 7 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 67657-73:
(7*6)+(6*7)+(5*6)+(4*5)+(3*7)+(2*7)+(1*3)=172
172 % 10 = 2
So 67657-73-2 is a valid CAS Registry Number.