Italian to English Science Chemistry; Chem Sci/Eng

This is from a chemical substance inventory form. It is the heading of one of the columns:
"Cancellata dal repertorio (Tutte le sostanze considerate Attive a meno che altrimenti specificato)"
Other column headings include Substance name, Manufacturer, Date of purchase, product number.
That's all the context I have. The only meanings I can make out are "railing" or else a past participle of the verb "cancellare" (to erase/delete/remove). Help!