420099-34-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 420099-34-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 4,2,0,0,9 and 9 respectively; the second part has 2 digits, 3 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 420099-34:
(8*4)+(7*2)+(6*0)+(5*0)+(4*9)+(3*9)+(2*3)+(1*4)=119
119 % 10 = 9
So 420099-34-9 is a valid CAS Registry Number.