442-65-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 442-65-9 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, 6 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 442-65:
(5*4)+(4*4)+(3*2)+(2*6)+(1*5)=59
59 % 10 = 9
So 442-65-9 is a valid CAS Registry Number.