121839-52-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 121839-52-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,1,8,3 and 9 respectively; the second part has 2 digits, 5 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 121839-52:
(8*1)+(7*2)+(6*1)+(5*8)+(4*3)+(3*9)+(2*5)+(1*2)=119
119 % 10 = 9
So 121839-52-9 is a valid CAS Registry Number.