664983-73-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 664983-73-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,6,4,9,8 and 3 respectively; the second part has 2 digits, 7 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 664983-73:
(8*6)+(7*6)+(6*4)+(5*9)+(4*8)+(3*3)+(2*7)+(1*3)=217
217 % 10 = 7
So 664983-73-7 is a valid CAS Registry Number.