172172-87-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 172172-87-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,2,1,7 and 2 respectively; the second part has 2 digits, 8 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 172172-87:
(8*1)+(7*7)+(6*2)+(5*1)+(4*7)+(3*2)+(2*8)+(1*7)=131
131 % 10 = 1
So 172172-87-1 is a valid CAS Registry Number.