Auramine O

"Canary yellow" redirects here. For the color, see Yellow. For the bird, see Yellow canary.
Auramine O
Solid Auramine O
Auramine O in aqueous solution
Names
IUPAC name
bis[4-(dimethylamino)phenyl]methaniminium chloride
Other names
Basic yellow 2, pyocatanium aureum, aizen auramine, pyoktanin yellow, canary yellow, pyoktanin, or C.I. 41000
Identifiers
2465-27-2 YesY
ChemSpider 16254 YesY
Jmol interactive 3D Image
Image
PubChem 17170
Properties
C17H22ClN3
Molar mass 303.83 g·mol−1
Melting point 267 °C (513 °F; 540 K)
Hazards
R-phrases R22 R24 R40
S-phrases S36/37 S45
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

Auramine O is a diarylmethane dye used as a fluorescent stain. In its pure form, Auramine O appears as yellow needle crystals. It is very soluble in water and soluble in ethanol.

Auramine O can be used to stain acid-fast bacteria (e.g. Mycobacterium, where it binds to the mycolic acid in its cell wall) in a way similar to Ziehl-Neelsen stain.[1] It can also be used as a fluorescent version of Schiff reagent.[2]

Auramine O can be used together with Rhodamine B as the Truant auramine-rhodamine stain for Mycobacterium tuberculosis.[3][4] It can be also used as an antiseptic agent.

References

  1. Kommareddi S, Abramowsky C, Swinehart G, Hrabak L (1984). "Nontuberculous mycobacterial infections: comparison of the fluorescent auramine-O and Ziehl-Neelsen techniques in tissue diagnosis". Hum Pathol 15 (11): 1085–9. doi:10.1016/S0046-8177(84)80253-1. PMID 6208117.
  2. Khavkin T, Kudryavtseva M, Dragunskaya E, Polotsky Y, Kudryavtsev B (1980). "Fluorescent PAS-reaction study of the epithelium of normal rabbit ileum and after challenge with enterotoxigenic Escherichia coli". Gastroenterology 78 (4): 782–90. PMID 6986320.
  3. Truant J, Brett W, Thomas W (1962). "Fluorescence microscopy of tubercle bacilli stained with auramine and rhodamine". Henry Ford Hosp Med Bull 10: 287–96. PMID 13922644.
  4. Arrowood M, Sterling C (1989). "Comparison of conventional staining methods and monoclonal antibody-based methods for Cryptosporidium oocyst detection". J Clin Microbiol 27 (7): 1490–5. PMC 267601. PMID 2475523.

External links

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