42403-81-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 42403-81-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,2,4,0 and 3 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 42403-81:
(7*4)+(6*2)+(5*4)+(4*0)+(3*3)+(2*8)+(1*1)=86
86 % 10 = 6
So 42403-81-6 is a valid CAS Registry Number.