91557-58-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 91557-58-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,1,5,5 and 7 respectively; the second part has 2 digits, 5 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 91557-58:
(7*9)+(6*1)+(5*5)+(4*5)+(3*7)+(2*5)+(1*8)=153
153 % 10 = 3
So 91557-58-3 is a valid CAS Registry Number.