20420-37-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 20420-37-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,0,4,2 and 0 respectively; the second part has 2 digits, 3 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 20420-37:
(7*2)+(6*0)+(5*4)+(4*2)+(3*0)+(2*3)+(1*7)=55
55 % 10 = 5
So 20420-37-5 is a valid CAS Registry Number.