5309-25-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 5309-25-1 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 5,3,0 and 9 respectively; the second part has 2 digits, 2 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 5309-25:
(6*5)+(5*3)+(4*0)+(3*9)+(2*2)+(1*5)=81
81 % 10 = 1
So 5309-25-1 is a valid CAS Registry Number.