17438-57-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 17438-57-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,7,4,3 and 8 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 17438-57:
(7*1)+(6*7)+(5*4)+(4*3)+(3*8)+(2*5)+(1*7)=122
122 % 10 = 2
So 17438-57-2 is a valid CAS Registry Number.