28831-93-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 28831-93-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,8,8,3 and 1 respectively; the second part has 2 digits, 9 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 28831-93:
(7*2)+(6*8)+(5*8)+(4*3)+(3*1)+(2*9)+(1*3)=138
138 % 10 = 8
So 28831-93-8 is a valid CAS Registry Number.