33131-20-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 33131-20-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,3,1,3 and 1 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 33131-20:
(7*3)+(6*3)+(5*1)+(4*3)+(3*1)+(2*2)+(1*0)=63
63 % 10 = 3
So 33131-20-3 is a valid CAS Registry Number.