423731-31-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 423731-31-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 4,2,3,7,3 and 1 respectively; the second part has 2 digits, 3 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 423731-31:
(8*4)+(7*2)+(6*3)+(5*7)+(4*3)+(3*1)+(2*3)+(1*1)=121
121 % 10 = 1
So 423731-31-1 is a valid CAS Registry Number.