2643-22-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 2643-22-3 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 2,6,4 and 3 respectively; the second part has 2 digits, 2 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 2643-22:
(6*2)+(5*6)+(4*4)+(3*3)+(2*2)+(1*2)=73
73 % 10 = 3
So 2643-22-3 is a valid CAS Registry Number.