129199-21-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 129199-21-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,9,1,9 and 9 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 129199-21:
(8*1)+(7*2)+(6*9)+(5*1)+(4*9)+(3*9)+(2*2)+(1*1)=149
149 % 10 = 9
So 129199-21-9 is a valid CAS Registry Number.