Aniline brown: Difference between revisions
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[[File:Aniline brown wool faded.png|thumb|Aniline Brown dye on wool after exposure to 85 Mlx-h<br> Credit: E. Hagan et al.]] | |||
== Description == | == Description == | ||
A synthetic brown dye prepared by | A synthetic brown dye prepared by heating [[rosaniline|rosaniline]] with an oxidizing agent such as ammonium chromate. Aniline brown was first made by Jacobson using this method. Many other aniline brown colorants, such as [[Bismarck brown]], are chemically similar (triamido-azobenzene hydrochloride) but are derived from aromatic diamines via diazotization. Aniline Brown directly forms a reddish brown color with [[silk|silk]] and a rich brown color with [[wool|wool]]. The brown dyes deeply penetrate the fibers of materials rather than just sitting on the surface. This provides a transparent, vibrant coloration that beautifully preserves the visibility of underlying textures, such as wood grain or the natural hide of leather. | ||
== | == Synonyms and Related Terms == | ||
Basic Brown 1; Bismarck brown, Manchester Brown | |||
==Risks== | |||
* Early aniline dyes can be toxic and cause skin irritation | |||
== Physical and Chemical Properties == | |||
== | * Insoluble in water | ||
* Soluble in alcohol and other organic solvents | |||
== Resources and Citations == | |||
* F. Crace-Calvert, ''Dyeing and Calico Printing'', Palmer & Howe, London, 1876 | * F. Crace-Calvert, ''Dyeing and Calico Printing'', Palmer & Howe, London, 1876 | ||
* E. Hagan, I. Castro-Soto, M. Breault, et al. [https://doi.org/10.1186/s40494-022-00675-9 The lightfastness of early synthetic organic dyes]. Herit Sci 10, 50 (2022). | |||
[[Category:Materials database]] | [[Category:Materials database]] | ||
Latest revision as of 12:44, 3 July 2026
Description
A synthetic brown dye prepared by heating rosaniline with an oxidizing agent such as ammonium chromate. Aniline brown was first made by Jacobson using this method. Many other aniline brown colorants, such as Bismarck brown, are chemically similar (triamido-azobenzene hydrochloride) but are derived from aromatic diamines via diazotization. Aniline Brown directly forms a reddish brown color with silk and a rich brown color with wool. The brown dyes deeply penetrate the fibers of materials rather than just sitting on the surface. This provides a transparent, vibrant coloration that beautifully preserves the visibility of underlying textures, such as wood grain or the natural hide of leather.
Synonyms and Related Terms
Basic Brown 1; Bismarck brown, Manchester Brown
Risks
- Early aniline dyes can be toxic and cause skin irritation
Physical and Chemical Properties
- Insoluble in water
- Soluble in alcohol and other organic solvents
Resources and Citations
- F. Crace-Calvert, Dyeing and Calico Printing, Palmer & Howe, London, 1876
- E. Hagan, I. Castro-Soto, M. Breault, et al. The lightfastness of early synthetic organic dyes. Herit Sci 10, 50 (2022).