42019-11-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 42019-11-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,2,0,1 and 9 respectively; the second part has 2 digits, 1 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 42019-11:
(7*4)+(6*2)+(5*0)+(4*1)+(3*9)+(2*1)+(1*1)=74
74 % 10 = 4
So 42019-11-4 is a valid CAS Registry Number.