51657-17-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 51657-17-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,1,6,5 and 7 respectively; the second part has 2 digits, 1 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 51657-17:
(7*5)+(6*1)+(5*6)+(4*5)+(3*7)+(2*1)+(1*7)=121
121 % 10 = 1
So 51657-17-1 is a valid CAS Registry Number.