664356-86-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 664356-86-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,6,4,3,5 and 6 respectively; the second part has 2 digits, 8 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 664356-86:
(8*6)+(7*6)+(6*4)+(5*3)+(4*5)+(3*6)+(2*8)+(1*6)=189
189 % 10 = 9
So 664356-86-9 is a valid CAS Registry Number.