349-21-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 349-21-3 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 3,4 and 9 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 349-21:
(5*3)+(4*4)+(3*9)+(2*2)+(1*1)=63
63 % 10 = 3
So 349-21-3 is a valid CAS Registry Number.