17903-04-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 17903-04-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,7,9,0 and 3 respectively; the second part has 2 digits, 0 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 17903-04:
(7*1)+(6*7)+(5*9)+(4*0)+(3*3)+(2*0)+(1*4)=107
107 % 10 = 7
So 17903-04-7 is a valid CAS Registry Number.