129172-72-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 129172-72-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,9,1,7 and 2 respectively; the second part has 2 digits, 7 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 129172-72:
(8*1)+(7*2)+(6*9)+(5*1)+(4*7)+(3*2)+(2*7)+(1*2)=131
131 % 10 = 1
So 129172-72-1 is a valid CAS Registry Number.