121687-84-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 121687-84-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,1,6,8 and 7 respectively; the second part has 2 digits, 8 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 121687-84:
(8*1)+(7*2)+(6*1)+(5*6)+(4*8)+(3*7)+(2*8)+(1*4)=131
131 % 10 = 1
So 121687-84-1 is a valid CAS Registry Number.