420-70-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 420-70-2 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 4,2 and 0 respectively; the second part has 2 digits, 7 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 420-70:
(5*4)+(4*2)+(3*0)+(2*7)+(1*0)=42
42 % 10 = 2
So 420-70-2 is a valid CAS Registry Number.