42004-71-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 42004-71-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,2,0,0 and 4 respectively; the second part has 2 digits, 7 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 42004-71:
(7*4)+(6*2)+(5*0)+(4*0)+(3*4)+(2*7)+(1*1)=67
67 % 10 = 7
So 42004-71-7 is a valid CAS Registry Number.