3191-81-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 3191-81-9 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 3,1,9 and 1 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 3191-81:
(6*3)+(5*1)+(4*9)+(3*1)+(2*8)+(1*1)=79
79 % 10 = 9
So 3191-81-9 is a valid CAS Registry Number.