57991-92-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 57991-92-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,7,9,9 and 1 respectively; the second part has 2 digits, 9 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 57991-92:
(7*5)+(6*7)+(5*9)+(4*9)+(3*1)+(2*9)+(1*2)=181
181 % 10 = 1
So 57991-92-1 is a valid CAS Registry Number.