17997-26-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 17997-26-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,7,9,9 and 7 respectively; the second part has 2 digits, 2 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 17997-26:
(7*1)+(6*7)+(5*9)+(4*9)+(3*7)+(2*2)+(1*6)=161
161 % 10 = 1
So 17997-26-1 is a valid CAS Registry Number.