19164-31-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 19164-31-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,9,1,6 and 4 respectively; the second part has 2 digits, 3 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 19164-31:
(7*1)+(6*9)+(5*1)+(4*6)+(3*4)+(2*3)+(1*1)=109
109 % 10 = 9
So 19164-31-9 is a valid CAS Registry Number.