664317-40-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 664317-40-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,6,4,3,1 and 7 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 664317-40:
(8*6)+(7*6)+(6*4)+(5*3)+(4*1)+(3*7)+(2*4)+(1*0)=162
162 % 10 = 2
So 664317-40-2 is a valid CAS Registry Number.