67839-42-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 67839-42-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,7,8,3 and 9 respectively; the second part has 2 digits, 4 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 67839-42:
(7*6)+(6*7)+(5*8)+(4*3)+(3*9)+(2*4)+(1*2)=173
173 % 10 = 3
So 67839-42-3 is a valid CAS Registry Number.