53558-55-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 53558-55-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,3,5,5 and 8 respectively; the second part has 2 digits, 5 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 53558-55:
(7*5)+(6*3)+(5*5)+(4*5)+(3*8)+(2*5)+(1*5)=137
137 % 10 = 7
So 53558-55-7 is a valid CAS Registry Number.