42003-90-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 42003-90-7 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 3 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 42003-90:
(7*4)+(6*2)+(5*0)+(4*0)+(3*3)+(2*9)+(1*0)=67
67 % 10 = 7
So 42003-90-7 is a valid CAS Registry Number.