20172-57-0 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 20172-57-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,0,1,7 and 2 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 20172-57:
(7*2)+(6*0)+(5*1)+(4*7)+(3*2)+(2*5)+(1*7)=70
70 % 10 = 0
So 20172-57-0 is a valid CAS Registry Number.