There are some merit-based scholarships that are doled out, but there is no separate application required. The school will reach out to you if they want you badly enough.
To apply, you'll need a 3.0 GPA, a minimum 1100 on your verbal and quantitative GRE, as well as undergraduate courses in general chem (2 semesters), organic chemistry (2 semesters), and quantitative analysis (1 semester). You have to get a B or better in these courses, too.
Admission is pretty competitive, too, with UAB getting around 100 applications each year for the limited number of spots. Get your application in some time between May and January, because they look at all the complete applications in February, and make decisions in early March.