201-91-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 201-91-2 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 2,0 and 1 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 201-91:
(5*2)+(4*0)+(3*1)+(2*9)+(1*1)=32
32 % 10 = 2
So 201-91-2 is a valid CAS Registry Number.