19993-40-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 19993-40-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,9,9,9 and 3 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 19993-40:
(7*1)+(6*9)+(5*9)+(4*9)+(3*3)+(2*4)+(1*0)=159
159 % 10 = 9
So 19993-40-9 is a valid CAS Registry Number.