1916-91-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1916-91-2 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,9,1 and 6 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1916-91:
(6*1)+(5*9)+(4*1)+(3*6)+(2*9)+(1*1)=92
92 % 10 = 2
So 1916-91-2 is a valid CAS Registry Number.