420813-18-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 420813-18-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 4,2,0,8,1 and 3 respectively; the second part has 2 digits, 1 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 420813-18:
(8*4)+(7*2)+(6*0)+(5*8)+(4*1)+(3*3)+(2*1)+(1*8)=109
109 % 10 = 9
So 420813-18-9 is a valid CAS Registry Number.