129338-81-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 129338-81-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,9,3,3 and 8 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 129338-81:
(8*1)+(7*2)+(6*9)+(5*3)+(4*3)+(3*8)+(2*8)+(1*1)=144
144 % 10 = 4
So 129338-81-4 is a valid CAS Registry Number.