421-33-0 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 421-33-0 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 4,2 and 1 respectively; the second part has 2 digits, 3 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 421-33:
(5*4)+(4*2)+(3*1)+(2*3)+(1*3)=40
40 % 10 = 0
So 421-33-0 is a valid CAS Registry Number.