| Identification | Back Directory | [Name]
D&CORANGENO.16 | [CAS]
31544-98-6 | [Synonyms]
C.I.45371
D&CORANGENO.16
Solvent Orange 18
D and C Orange No.16
C.I.Solvent Orange 18
C.I.Solvent Orange 18:C.I.45371
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
4',5'-Dibromo-3',6'-dihydroxy-2',7'-diiodospiro[isobenzofuran-1(3H),9'-[9H]xanthen]-3-one
Spiro[isobenzofuran-1(3H),9'-[9H]xanthen]-3-one, 4',5'-dibromo-3',6'-dihydroxy-2',7'-diiodo- | [Molecular Formula]
C20H8Br2I2O5 | [MOL File]
31544-98-6.mol | [Molecular Weight]
741.89 |
| Hazard Information | Back Directory | [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.
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Standard
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Light Fastness
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Heat-resistant(℃)
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water
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Sodium Carbonate(5%)
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Hydrochloric acid(5%)
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Melting point
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Stable
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ISO
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Insoluble
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Dissolve
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