202811-22-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 202811-22-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,2,8,1 and 1 respectively; the second part has 2 digits, 2 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 202811-22:
(8*2)+(7*0)+(6*2)+(5*8)+(4*1)+(3*1)+(2*2)+(1*2)=81
81 % 10 = 1
So 202811-22-1 is a valid CAS Registry Number.