161765-70-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 161765-70-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,6,1,7,6 and 5 respectively; the second part has 2 digits, 7 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 161765-70:
(8*1)+(7*6)+(6*1)+(5*7)+(4*6)+(3*5)+(2*7)+(1*0)=144
144 % 10 = 4
So 161765-70-4 is a valid CAS Registry Number.