Names | |
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IUPAC name
[4-[Bis(4-aminophenyl)methylidene]-1-cyclohexa-2,5-dienylidene]dianiline
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Other names
Pararosaniline
p-rosaniline C.I. 42500 Para magenta | |
Identifiers | |
3D model (JSmol)
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ChEBI | |
ChemSpider | |
ECHA InfoCard | 100.106.992 |
KEGG | |
PubChem CID
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UNII | |
CompTox Dashboard (EPA)
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Properties | |
C19H17N3 | |
Molar mass | 323.83 g/mol |
Appearance | Green crystalline solid |
Melting point | 268 to 270 °C (514 to 518 °F; 541 to 543 K) decomposes |
Slightly soluble | |
Hazards | |
Safety data sheet (SDS) | External MSDS |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Pararosaniline, Basic Red 9, or C.I. 42500 is an organic compound with the formula [(H2NC6H4)3C]Cl. It is a magenta solid with a variety of uses as a dye.[1] It is one of the four components of basic fuchsine. (The others are rosaniline, new fuchsine and magenta II.)[2] It is structurally related to other triarylmethane dyes called methyl violets including crystal violet, which feature methyl groups on nitrogen.
It is prepared by the condensation of aniline and para-aminobenzaldehyde. Alternatively, it arises from the oxidation of 4,4'-bis(aminophenyl)methane in the presence of aniline.