172506-91-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 172506-91-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,2,5,0 and 6 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 172506-91:
(8*1)+(7*7)+(6*2)+(5*5)+(4*0)+(3*6)+(2*9)+(1*1)=131
131 % 10 = 1
So 172506-91-1 is a valid CAS Registry Number.