2319-91-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 2319-91-7 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 2,3,1 and 9 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 2319-91:
(6*2)+(5*3)+(4*1)+(3*9)+(2*9)+(1*1)=77
77 % 10 = 7
So 2319-91-7 is a valid CAS Registry Number.