211801-28-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 211801-28-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,1,8,0 and 1 respectively; the second part has 2 digits, 2 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 211801-28:
(8*2)+(7*1)+(6*1)+(5*8)+(4*0)+(3*1)+(2*2)+(1*8)=84
84 % 10 = 4
So 211801-28-4 is a valid CAS Registry Number.