91704-77-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 91704-77-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,1,7,0 and 4 respectively; the second part has 2 digits, 7 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 91704-77:
(7*9)+(6*1)+(5*7)+(4*0)+(3*4)+(2*7)+(1*7)=137
137 % 10 = 7
So 91704-77-7 is a valid CAS Registry Number.