665017-64-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 665017-64-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,6,5,0,1 and 7 respectively; the second part has 2 digits, 6 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 665017-64:
(8*6)+(7*6)+(6*5)+(5*0)+(4*1)+(3*7)+(2*6)+(1*4)=161
161 % 10 = 1
So 665017-64-1 is a valid CAS Registry Number.