1821811-20-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1821811-20-4 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,8,2,1,8,1 and 1 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 1821811-20:
(9*1)+(8*8)+(7*2)+(6*1)+(5*8)+(4*1)+(3*1)+(2*2)+(1*0)=144
144 % 10 = 4
So 1821811-20-4 is a valid CAS Registry Number.