281665-40-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 281665-40-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,8,1,6,6 and 5 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 281665-40:
(8*2)+(7*8)+(6*1)+(5*6)+(4*6)+(3*5)+(2*4)+(1*0)=155
155 % 10 = 5
So 281665-40-5 is a valid CAS Registry Number.