667422-87-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 667422-87-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,6,7,4,2 and 2 respectively; the second part has 2 digits, 8 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 667422-87:
(8*6)+(7*6)+(6*7)+(5*4)+(4*2)+(3*2)+(2*8)+(1*7)=189
189 % 10 = 9
So 667422-87-9 is a valid CAS Registry Number.