Erythrosin

Other Names Fluorescein, 2, 4, 5, 7 -tetraiodo-, disodium salt 1427 Red 1671 Red 2, 4, 5, 7 -Tetraiodofluorescein disodium salt 2,4,5,7-Tetraiodofluorescein disodium salt Acid Red 51 Aizen Erythrosine Aizen Food Red 3 C.l. 45430 C.I. Acid Red 51 C.l. Food Red 14 Calco-cid Erythrosine N Canacert Erythrosine BS Ceplac Cilefa Pink B D and C Red No. 3 D C Red No. 3 Dolkwal Erythrosine E 127 Edicol Supra Erythrosin AS Edicol Supra Erythrosine A Erythrosin Erythrosin B Erythrosin B sodium salt Erythrosin BS Erythrosine Erythrosine 3B Erythrosine B-EO Erythrosine BS Erythrosine Bluish Erythrosine Extra Erythrosine Extra Cone. A Export Erythrosine Extra Pure A Erythrosine I Erythrosine K-EO Erythrosine TB Erythrosine TB Extra Erythrosine extra bluish FD and C Red 3 FD and C Red No. 3 FD C Red No. 3 FDC Red 3 FDC Red 3 dye Food Color Red 3 Food Dye Red 3 Food Red 14 Food Red 3 Food Red No. 3 Hexacert Red No. 3 Hexacol Erythrosine BS Japan Red 3 Japan Red No. 3 Maple Erythrosine New Pink Bluish Geigy Red 1799 S 887 Synerid Tetraiodofluorescein sodium salt Usacert Red No. 3 

CA Index Name Spiro[isobenzofuran-l(3H),9 -[9H]xanthen]-3-one, 3, 6 -dihydroxy-2, 4, 5, 7 -tetraiodo-, disodium salt CAS Registry Number 16423-68-0 Merck Index Number 3693 Chemical Structure 

Chemical/Dye Class Huorescent, Xanthene Molecular Formula C2oH6l405Na2 Molecular Weight 879.86 pH Range 2.5. 0 

Color Change at pH Nonfluorescence (2.5) to light green or reddish fluorescence (4.0) pKa 4.1 

Physical Form Brown powder Solubility Soluble in water, ethanol UV-Visible (X ax) 525 nm Melting Point 250°C Synthesis Synthetic methods -  

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Pood Red 14 [16423-68-0] 45430 erythrosine Warner Jenkinson Co. Hilton-Davis... 

Dye-Sensitized Photoisomerization. One technological appHcation of photoisomerization is in the synthesis of vitamin A. In a mixture of vitamin A acetate (all-trans stmcture) and the 11-cis isomer (23), sensitized photoisomerization of the 11-cis to the all-trans molecule occurs using zinc tetraphenylporphyrin, chlorophyU, hematoporphyrin, rose bengal, or erythrosin as sensitizers (73). Another photoisomerization is reported to be responsible for dye laser mode-locking (74). In this example, one metastable isomer of an oxadicarbocyanine dye was formed during flashlamp excitation, and it was the isomer that exhibited mode-locking characteristics. 

NMR, 4, 575 Erythritol, 1,4-anhydro-structure, 4, 546 Erythromycin antibacterial veterinary use, 1, 206 as pharmaceutical, 1, 153 synthesis, 1, 480 Erythropterin biosynthesis, 3, 321 occurence, 3, 323 structure, 3, 276 synthesis, 3, 289 Erythropterin, 3,5-dimethyl-methyl ester synthesis, 3, 303 Erythrosine application, 3, 879 Esculetin... 

Berzas Nevado, J.J. et ah. Simultaneous determination of tartrazine, riboflavine, curcumin and erythrosine by derivative spectrophotometry, Fresenius J. Anal. Chem., 350, 610, 1994. 

Quinophthalon dyes Quinoline yellow Xanthene dyes Erythrosine (see below)... 

Erythrosine (E 127, FD C Red No. 3, Cl Food Red 14) is a xanthene dye named disodium salt of 2-(2,4,5,7-tetraiodo-3-oxido-6-oxoxanthen-9-yl)benzoate monohydrate (or disodium salt of 9-(o-carboxyphenyl)-6-hydroxy-2,4,5,7-tetraiodo-... 

In the food industry, synthetic dyes can be used also in the form of lakes obtained by precipitation of a soluble colorant onto an insoluble base. There are several insoluble bases, but only alumina is permitted for food application by FDA and EU regulation. All the synthetic food dyes can be obtained and used in food in the form of aluminium lakes, except erythrosine due to concerns about inorganic iodine content. 

Common additives in food are sulfur S(IV) oxospecies. Quinoline Yellow and Tartrazine show excellent stability toward S(IV) oxospecies while erythrosine. Red 2G, and Green S show good stability. - All other colorants show fair stability, except indigotine, which fades. In the presence of metabisulflte. Sunset Yellow FCF is degraded to a lemon yellow compound identified as l-(4 -sulfo-l-phenylhydrazo)-keto-3,3,4-trihydronaphtalene-4,6-disulfonic acid by NMR and FAB-MS techniques. ... 

Wood, S.,et ah, Erythrosine is a potential photosensitizer for the photodynamic therapy of oral plaque biofihns, J. Antimicrob. Chemother., 57, 680, 2006. Hurlstone, D.P., et ah. Indigo carmine-assisted high-magnification chromoscopic colonoscopy for the detection and characterisation of intraepithelial neoplasia in ulcerative colitis a prospective evaluation. Endoscopy, 37,1186, 2005. 

It appears that Charlton et al.94,95 have discovered the first methods for reversible and continuous optical measurement of the clinically highly important alkali and earth alkali ions. In one approach94 they use plasticized poly(vinyl chloride) along with valinomycin as the ion carrier, and a detection scheme that was later refered to as co-extraction. In their system, potassium ion is extracted into plasticized PVC, and the same quantity of the anionic red dye erythrosine is co-extracted into it. The extracted erythrosine is quantified via absorbance or reflectance. 

Narayanan V.A., Stokes D.L., Vo-Dihn T., Vibrational spectral-analysis of eosin-y and erythrosin-b - intensity studies for quantitative detection of the dyes, J. Raman Spectrosc. 1994 25 415-422. 

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