1620172-13-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1620172-13-5 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,6,2,0,1,7 and 2 respectively; the second part has 2 digits, 1 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 1620172-13:
(9*1)+(8*6)+(7*2)+(6*0)+(5*1)+(4*7)+(3*2)+(2*1)+(1*3)=115
115 % 10 = 5
So 1620172-13-5 is a valid CAS Registry Number.