121684-87-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 121684-87-5 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 4 respectively; the second part has 2 digits, 8 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 121684-87:
(8*1)+(7*2)+(6*1)+(5*6)+(4*8)+(3*4)+(2*8)+(1*7)=125
125 % 10 = 5
So 121684-87-5 is a valid CAS Registry Number.