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Indigo carmine, or 5,5′-indigodisulfonic acid sodium salt, is an organic salt derived from indigo by aromatic sulfonation, which renders the compound soluble in water. Like indigo, it produces a blue color , and is used in food and other consumables , cosmetics, and as a medical contrast agent and staining agent; it also acts as a pH indicator .
For this test, the patient takes oral phenazopyridine (Pyridium) 200 mg three times a day, and indigo carmine or methylene blue is filled into the empty urinary bladder via a urethral catheter. Pyridium turns urine orange in the kidneys, and methylene blue (or indigo carmine) turns urine blue in the bladder. [1] A tampon is placed into the ...
The glucose solution is added to the solution containing indicator (dye indigo carmine) the color changes occur. This reaction is also known as chemical clock experiment because concentrations of the products and reactants changed over the specific period. [22] When the solution is shaken, oxygen dissolves in the solution and oxidizes indigo ...
There is also a device called a uterine manipulator that is placed through the vagina and cervix into the uterus. [5] As part of a laparoscopy, a blue dye solution (methylene blue or indigo carmine) is introduced into the uterine cavity. The dye solution will help determine if the fallopian tubes are open or blocked.
Indigo carmine, also known as indigo, is an indigo derivative which is also used as a colorant. About 20,000 tonnes are produced annually, again mainly for the production of blue jeans. [ 1 ] It is also used as a food colorant, and is listed in the United States as FD&C Blue No. 2.
Harris English lines up a putt on the fourth hole on the South Course at Torrey Pines during the third round of the Farmers Insurance Open golf tournament Friday, Jan. 24, 2025, in San Diego.
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Like many other color additives, the primary use of Blue No. 1 is to correct or enhance natural coloring or to give colorless compounds a vivid hue. [7] In the United States, of the two approved blue dyes (the other being Indigo carmine, or FD&C Blue #2), brilliant blue FCF is the