25681-81-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 25681-81-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,5,6,8 and 1 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 25681-81:
(7*2)+(6*5)+(5*6)+(4*8)+(3*1)+(2*8)+(1*1)=126
126 % 10 = 6
So 25681-81-6 is a valid CAS Registry Number.