426840-81-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 426840-81-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 4,2,6,8,4 and 0 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 426840-81:
(8*4)+(7*2)+(6*6)+(5*8)+(4*4)+(3*0)+(2*8)+(1*1)=155
155 % 10 = 5
So 426840-81-5 is a valid CAS Registry Number.