17742-66-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 17742-66-4 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, 6 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 17742-66:
(7*1)+(6*7)+(5*7)+(4*4)+(3*2)+(2*6)+(1*6)=124
124 % 10 = 4
So 17742-66-4 is a valid CAS Registry Number.