1543344-31-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1543344-31-5 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,5,4,3,3,4 and 4 respectively; the second part has 2 digits, 3 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1543344-31:
(9*1)+(8*5)+(7*4)+(6*3)+(5*3)+(4*4)+(3*4)+(2*3)+(1*1)=145
145 % 10 = 5
So 1543344-31-5 is a valid CAS Registry Number.