20442-90-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 20442-90-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,0,4,4 and 2 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 20442-90:
(7*2)+(6*0)+(5*4)+(4*4)+(3*2)+(2*9)+(1*0)=74
74 % 10 = 4
So 20442-90-4 is a valid CAS Registry Number.