91662-90-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 91662-90-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,1,6,6 and 2 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 91662-90:
(7*9)+(6*1)+(5*6)+(4*6)+(3*2)+(2*9)+(1*0)=147
147 % 10 = 7
So 91662-90-7 is a valid CAS Registry Number.