test the pH (acidity/akalinity). red litmus turns blue in a basic solution; blue litmus turns red in an acid.
Most lab supply stores should have it. Grainger has it, and they have local outlets in most larger cities in the...
Litmus is a natural dye indicator extracted from lichens.They react with acid (blue litmus turns red)& bases(red litmus turns blue) .Paper made with litmus dye indicators are called litmus paper...
Because PH Paper indicates 1-14 PH range. But Litmus paper indicates only 2. I mean Acid & the other thing.
white.