25721-75-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 25721-75-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,5,7,2 and 1 respectively; the second part has 2 digits, 7 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 25721-75:
(7*2)+(6*5)+(5*7)+(4*2)+(3*1)+(2*7)+(1*5)=109
109 % 10 = 9
So 25721-75-9 is a valid CAS Registry Number.