17742-03-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 17742-03-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,7,7,4 and 2 respectively; the second part has 2 digits, 0 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 17742-03:
(7*1)+(6*7)+(5*7)+(4*4)+(3*2)+(2*0)+(1*3)=109
109 % 10 = 9
So 17742-03-9 is a valid CAS Registry Number.