191664-04-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 191664-04-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,1,6,6 and 4 respectively; the second part has 2 digits, 0 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 191664-04:
(8*1)+(7*9)+(6*1)+(5*6)+(4*6)+(3*4)+(2*0)+(1*4)=147
147 % 10 = 7
So 191664-04-7 is a valid CAS Registry Number.