17704-61-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 17704-61-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,7,7,0 and 4 respectively; the second part has 2 digits, 6 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 17704-61:
(7*1)+(6*7)+(5*7)+(4*0)+(3*4)+(2*6)+(1*1)=109
109 % 10 = 9
So 17704-61-9 is a valid CAS Registry Number.