D&CORANGENO.16
D&CORANGENO.16 Basic information
- Product Name:
- D&CORANGENO.16
- Synonyms:
-
- D&CORANGENO.16
- 4',5'-Dibromo-3',6'-dihydroxy-2',7'-diiodospiro[isobenzofuran-1(3H),9'-[9H]xanthen]-3-one
- C.I.45371
- C.I.Solvent Orange 18
- D and C Orange No.16
- 2-(4,5-Dibromo-2,7-diiodo-3-oxo-6-hydroxy-3H-xanthen-9-yl)benzoic acid
- 4',5'-dibromo-3',6'-dihydroxy-2',7'-diiodo-spiro[phthalan-1,9'-xanthen]-3-one
- Spiro[isobenzofuran-1(3H),9'-[9H]xanthen]-3-one, 4',5'-dibromo-3',6'-dihydroxy-2',7'-diiodo-
- CAS:
- 31544-98-6
- MF:
- C20H8Br2I2O5
- MW:
- 741.89
- Mol File:
- 31544-98-6.mol
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D&CORANGENO.16 Chemical Properties
- Boiling point:
- 628.1±55.0 °C(Predicted)
- Density
- 2.73±0.1 g/cm3(Predicted)
- pka
- 7.09±0.20(Predicted)
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D&CORANGENO.16 Usage And Synthesis
Preparation
preparation??and?C.I. .Solvent Red 42?and similar (2,4-Dichlororesorcinol?(2 Moore) and?Phthalic anhydride?(1 Moore) with Sodium hydroxide extraction condensation, segregation out 2 ‘, 4 ‘, 5 ‘, 7 ‘- tetrachloro-fluorescein, then use hydrochloric acid acidification.
Properties and Applications
brilliant orange. Insoluble in water, slightly soluble in alcohol, soluble in 5% sodium carbonate solution. In concentrated sulfuric acid to yellow, dilution have orange precipitation; In 10% sodium hydroxide solution for pink.
| Standard | Light Fastness | Heat-resistant(℃) | water | Sodium Carbonate(5%) | Hydrochloric acid(5%) | |
| Melting point | Stable | |||||
| ISO | Insoluble | Dissolve | ||||