423138-55-0 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 423138-55-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 4,2,3,1,3 and 8 respectively; the second part has 2 digits, 5 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 423138-55:
(8*4)+(7*2)+(6*3)+(5*1)+(4*3)+(3*8)+(2*5)+(1*5)=120
120 % 10 = 0
So 423138-55-0 is a valid CAS Registry Number.