121975-53-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 121975-53-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,1,9,7 and 5 respectively; the second part has 2 digits, 5 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 121975-53:
(8*1)+(7*2)+(6*1)+(5*9)+(4*7)+(3*5)+(2*5)+(1*3)=129
129 % 10 = 9
So 121975-53-9 is a valid CAS Registry Number.