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Pigment Red 179 is an organic compound used as a pigment. Structurally, it is a derivative of perylene, produced from perylenetetracarboxylic dianhydride through derivatization with methylamine. [1] [2] It is used in watercolor paints, usually labeled as Perylene Maroon.
As all madder-based pigments are fugitive, artists have long sought a more permanent and lightfast replacement for rose madder and alizarin. Alternative pigments include: Anthraquinone red (PR177), a chemical cousin of Alizarin [3] Benzamida carmine (PR176) [3] Perylene maroon (PR179), for mixing dull violets [3] Pyrrole rubine (PR264) [3]
Several perylene pigments have been developed for artist's paints : Pigment red 149, a middle red, between light and dark cadmium red. (chemical structure: replace HN group in PV29 with 3,5-(CH 3) 2 C 6 H 3). Pigment Red 179, which is close to alizarin crimson (chemical structure: replace HN group in PV29 with CH 3 N).
The two Isomers of perinone [1] are useful pigments. The trans isomer is called Pigment Orange 43 ("PO43", CID 78141 from PubChem) and the cis isomer is called Pigment Red 194 ("PR194", CID 77892 from PubChem). [2] Like some structurally related compounds perinone is also an organic semiconductor. [3]
Clay earth pigments such as burnt sienna often have a high lightfastness. Lightfastness is a property of a colourant such as dye or pigment that describes its resistance to fading when exposed to light. [1] [2] [3] Dyes and pigments are used for example for dyeing of fabrics, plastics or other materials and manufacturing paints or printing inks.
This color is made by mixing three primary colors: red, yellow and blue. OK, that's it for hints—I don't want to totally give it away before revealing the answer!
Naphthol Red (Pigment red 170 or PR170) is an organic pigment extensively used in automotive coatings and painting.. It is produced synthetically by converting p-aminobenzamide into the corresponding diazonium compound followed by coupling with 3-hydroxy-2-naphththoic acid (2-ethoxy)anilide ("Naphtol AS-PH" dye precursor).
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