442-44-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 442-44-4 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 4,4 and 2 respectively; the second part has 2 digits, 4 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 442-44:
(5*4)+(4*4)+(3*2)+(2*4)+(1*4)=54
54 % 10 = 4
So 442-44-4 is a valid CAS Registry Number.