666207-81-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 666207-81-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,6,6,2,0 and 7 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 666207-81:
(8*6)+(7*6)+(6*6)+(5*2)+(4*0)+(3*7)+(2*8)+(1*1)=174
174 % 10 = 4
So 666207-81-4 is a valid CAS Registry Number.