664370-81-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 664370-81-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,6,4,3,7 and 0 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 664370-81:
(8*6)+(7*6)+(6*4)+(5*3)+(4*7)+(3*0)+(2*8)+(1*1)=174
174 % 10 = 4
So 664370-81-4 is a valid CAS Registry Number.