A dyestuff extracted from certain lichens (Roccella tinctoria, Lecanora tartarea, etc.), as a blue amorphous mass which consists of a compound of the alkaline carbonates with certain coloring matters related to orcin and orcein.
A mixture of pigments extracted from certain lichens that turns blue in basic solution and red in acidic solution.
Purple coloring matter obtained from various lichens, used as an acid indicator in chemical analysis because it turns blue in alkaline solutions and red in acid solutions.
a dye extracted from lichens used as an acid/base indicator; litmus is red in an acidic solution and blue in a basic solution.
This is extracted from lichen and used as an acid-base indicator.
A pH indicator paper (range 4.5-8.3) impregnated with an extracted lichen pigment. It turns red in acidic and blue in alkaline solutions. However, the use of litmus paper as an indicator is not a precise method of pH measurement.
an indicator that turns red in acid and blue in alkaline solution.
A simple kind of indicator. It is red in acids and blue in alkalis.
a coloring material (obtained from lichens) that turns red in acid solutions and blue in alkaline solutions; used as a very rough acid-base indicator
An indicator made from a plant extract that turns blue when placed in an alkali solution and red in an acidic solution. Although litmus is actually a liquid, it is normally soaked into a type of paper similar to blotting paper, and called litmus paper. Mixture : Two or more atoms mixed together but not chemically bonded to each other, or two or more compounds mixed together but not chemically bonded to each other. Unlike compounds, the constituent parts of a mixture can be separated by purely physical means (boiling, melting, sieving, filtering etc.)
Plant pigment commonly used as an acid base indicator.Litmus is red (or pink) in an acid, and blue in a base.
