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CAS No.: | 15905-32-5 |
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Name: | ERYTHROSIN B |
Article Data: | 17 |
Molecular Structure: | |
Formula: | C20H8 I4 O5 |
Molecular Weight: | 835.899 |
Synonyms: | Fluorescein,2',4',5',7'-tetraiodo- (8CI); 2',4',5',7'-Tetraiodofluorescein;3',6'-Dihydroxy-2',4',5',7'-tetraiodospiro[isobenzofuran-1(3H),9'-(9H)xanthen]-3-one;C.I. 45430:2; C.I. Solvent Red 140; Erythrosin J; Erythrosine J; Erythrosineacid; Iodeosin; NSC 328781; Solvent Red 140; Tetraiodofluorescein |
EINECS: | 240-046-0 |
Density: | 2.93 g/cm3 |
Melting Point: | 303 °C (dec.)(lit.) |
Boiling Point: | 628.3 °C at 760 mmHg |
Flash Point: | 333.8 °C |
Solubility: | spirit: soluble |
Appearance: | powder |
Safety: | 22-24/25 |
PSA: | 75.99000 |
LogP: | 6.08420 |
Conditions | Yield |
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With Oxone; sodium iodide at 200℃; for 12h; | A 70% B 30% |
Conditions | Yield |
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With pyridine; iodine; silver nitrate |
fluorescein
erythrosine B
Conditions | Yield |
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With iodine Behandeln mit Eisessig; | |
With sodium hydroxide; iodine; acetic acid | |
With dihydrogen peroxide; sodium iodide In ethanol at 20℃; for 5h; Autoclave; Large scale; |
erythrosine B
Conditions | Yield |
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With oxygen Irradiation; photo-bleaching in some polymer-films: permeability of O2, glass-transition-temp., rel. index of polarity, quantum yield of bleaching, influence of O2; |
Conditions | Yield |
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With pyridine; dmap In dichloromethane for 1h; | 32% |
Conditions | Yield |
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dicyclohexyl-carbodiimide In DMF (N,N-dimethyl-formamide) at 4 - 20℃; |
erythrosine B
Conditions | Yield |
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dicyclohexyl-carbodiimide In benzene at 0℃; for 72h; |
erythrosine B
Conditions | Yield |
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With dmap; dicyclohexyl-carbodiimide In DMF (N,N-dimethyl-formamide) at 0℃; for 16h; |
erythrosine B
2',4',5',7'-tetraiodofluorescein disodium salt
Conditions | Yield |
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With sodium hydroxide In water at 20℃; for 4.5h; Autoclave; Large scale; | 7.9 kg |
Conditions | Yield |
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Stage #1: erythrosine B; sodium thiomethoxide With acetic anhydride Stage #2: With tetrakis(triphenylphosphine) palladium(0) Further stages; |