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Additional recommended knowledge
The primary use of Indigo carmine is as a pH indicator. It is blue at pH 11.4 and yellow at 13.0. . It is also used in the manufacturing of capusles as a soluble pigment.
Indigo carmine is harmful to the respiratory tract if swallowed. It is also an irritant to the skin and eyes. Proper laboratory cautions (Lab coat, gloves, goggles) are advised.
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Indigo_carmine". A list of authors is available in Wikipedia.|