280551-71-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 280551-71-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,8,0,5,5 and 1 respectively; the second part has 2 digits, 7 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 280551-71:
(8*2)+(7*8)+(6*0)+(5*5)+(4*5)+(3*1)+(2*7)+(1*1)=135
135 % 10 = 5
So 280551-71-5 is a valid CAS Registry Number.