642-02-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 642-02-4 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 6,4 and 2 respectively; the second part has 2 digits, 0 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 642-02:
(5*6)+(4*4)+(3*2)+(2*0)+(1*2)=54
54 % 10 = 4
So 642-02-4 is a valid CAS Registry Number.