2',4',5',7'-tetrachlorofluorescein
2',4',5',7'-tetrachlorofluorescein Basic information
- Product Name:
- 2',4',5',7'-tetrachlorofluorescein
- Synonyms:
-
- 2',4',5',7'-tetrachlorofluorescein
- D and C Red No.26
- Spiro(isobenzofuran-1(3H),9'-(9H)xanthen)-3-one, 2',4',5',7'-tetrachloro-3',6'-dihydroxy-
- 2',4',5',7'-tetrachloro-3',6'-dihydroxyspiro[2-benzofuran-3,9'-xanthene]-1-one
- C.I.Solvent Red 42:C.I.45366
- Solvent Red 42
- CAS:
- 2320-38-9
- MF:
- C20H8Cl4O5
- MW:
- 470.09
- Mol File:
- 2320-38-9.mol
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2',4',5',7'-tetrachlorofluorescein Chemical Properties
- Melting point:
- 296-305 °C(Solv: acetic acid (64-19-7))
- Boiling point:
- 647.4±55.0 °C(Predicted)
- Density
- 1.87±0.1 g/cm3(Predicted)
- pka
- 7.07±0.20(Predicted)
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2',4',5',7'-tetrachlorofluorescein Usage And Synthesis
Preparation
2,4-Dichlororesorcinol (2 Moore) and Phthalic anhydride (1 Moore) condensation, with Sodium hydroxide extraction segregating out 2 ‘, 4 ‘, 5 ‘, 7 ‘- tetrachlorofluorescein?(melting point of 296 ~ 305 ℃), then use Hydrochloric acid acidification.
Properties and Applications
blue light pink. Insoluble in water, soluble in 10% sodium hydroxide solution.
| Standard | Light Fastness | Heat-resistant(℃) | water | Sodium Carbonate(5%) | Hydrochloric acid(5%) | |
| Melting point | Stable | |||||
| ISO | Poor | Poor | Insoluble | |||