657389-90-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 657389-90-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,5,7,3,8 and 9 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 657389-90:
(8*6)+(7*5)+(6*7)+(5*3)+(4*8)+(3*9)+(2*9)+(1*0)=217
217 % 10 = 7
So 657389-90-7 is a valid CAS Registry Number.