Pyranine
Skeletal formula of pyranine | |
Space-filling model of pyranine as a sodium salt | |
Names | |
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IUPAC name
trisodium 8-hydroxypyrene-1,3,6-trisulfonate
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Other names
8-hydroxypyrene-1,3,6-trisulfonic acid, Solvent Green 7, HPTS, sulfonated hydroxy pyrene trisodium salt
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Identifiers | |
6358-69-6 | |
EC Number | 228-783-6 |
Jmol 3D model | Interactive image |
PubChem | 4136521 |
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Properties | |
C16H7Na3O10S3 | |
Molar mass | 524.37 |
Appearance | yellow-green crystalline powder |
Soluble | |
Vapor pressure | {{{value}}} |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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verify (what is ?) | |
Infobox references | |
Pyranine is a hydrophilic, pH-sensitive fluorescent dye from the group of chemicals known as arylsulfonates.[1][2] Pyranine is soluble in water and has applications as a coloring agent, biological stain, optical detecting reagent, and a pH indicator.[3][4] One example would be the measurement of intracellular pH.[5] Pyranine is also found in yellow highlighters, giving them their characteristic fluorescence and bright yellow-green colour. It is also found in some types of soap.[6]
Synthesis
It is synthesized from pyrenetetrasulfonic acid and a solution of sodium hydroxide in water under reflux.[7] The trisodium salt crystallizes as yellow needles when adding an aqueous solution of sodium chloride.
See also
External links
References
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- ↑ http://householdproducts.nlm.nih.gov/cgi-bin/household/brands?tbl=chem&id=218
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- Staining dyes
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