2505-55-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 2505-55-7 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 2,5,0 and 5 respectively; the second part has 2 digits, 5 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 2505-55:
(6*2)+(5*5)+(4*0)+(3*5)+(2*5)+(1*5)=67
67 % 10 = 7
So 2505-55-7 is a valid CAS Registry Number.