681121-05-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 681121-05-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,8,1,1,2 and 1 respectively; the second part has 2 digits, 0 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 681121-05:
(8*6)+(7*8)+(6*1)+(5*1)+(4*2)+(3*1)+(2*0)+(1*5)=131
131 % 10 = 1
So 681121-05-1 is a valid CAS Registry Number.