7540-25-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 7540-25-2 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 7,5,4 and 0 respectively; the second part has 2 digits, 2 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 7540-25:
(6*7)+(5*5)+(4*4)+(3*0)+(2*2)+(1*5)=92
92 % 10 = 2
So 7540-25-2 is a valid CAS Registry Number.