2290-81-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 2290-81-5 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 2,2,9 and 0 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 2290-81:
(6*2)+(5*2)+(4*9)+(3*0)+(2*8)+(1*1)=75
75 % 10 = 5
So 2290-81-5 is a valid CAS Registry Number.