642-10-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 642-10-4 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, 1 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 642-10:
(5*6)+(4*4)+(3*2)+(2*1)+(1*0)=54
54 % 10 = 4
So 642-10-4 is a valid CAS Registry Number.