280561-89-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 280561-89-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,8,0,5,6 and 1 respectively; the second part has 2 digits, 8 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 280561-89:
(8*2)+(7*8)+(6*0)+(5*5)+(4*6)+(3*1)+(2*8)+(1*9)=149
149 % 10 = 9
So 280561-89-9 is a valid CAS Registry Number.