423138-12-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 423138-12-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 4,2,3,1,3 and 8 respectively; the second part has 2 digits, 1 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 423138-12:
(8*4)+(7*2)+(6*3)+(5*1)+(4*3)+(3*8)+(2*1)+(1*2)=109
109 % 10 = 9
So 423138-12-9 is a valid CAS Registry Number.