664317-57-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 664317-57-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,6,4,3,1 and 7 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 664317-57:
(8*6)+(7*6)+(6*4)+(5*3)+(4*1)+(3*7)+(2*5)+(1*7)=171
171 % 10 = 1
So 664317-57-1 is a valid CAS Registry Number.