57197-42-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 57197-42-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,7,1,9 and 7 respectively; the second part has 2 digits, 4 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 57197-42:
(7*5)+(6*7)+(5*1)+(4*9)+(3*7)+(2*4)+(1*2)=149
149 % 10 = 9
So 57197-42-9 is a valid CAS Registry Number.