- azolitmin paper
- filter paper saturated with a solution of azolitmin; acids turn it purple to bright red, alkalis turn it blue.
Medical dictionary. 2011.
Medical dictionary. 2011.
Litmus test (chemistry) — Litmus is a water soluble mixture of different dyes extracted from lichens, especially Roccella tinctoria . The mixture has CAS number 1393 92 6. It is often absorbed onto filter paper. The resulting piece of paper or solution with water becomes… … Wikipedia
litmus — /lit meuhs/, n. a blue coloring matter obtained from certain lichens, esp. Roccella tinctoria. In alkaline solution litmus turns blue, in acid solution, red: widely used as a chemical indicator. [1495 1505; earlier lytmos < ON litmosi dye moss,… … Universalium
pH indicator — Acids and Bases Acid dissociation constant Acid base extraction Acid–base reaction Acid–base titration Dissociation constant Acidity function Buffer sol … Wikipedia