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Yellow ochre (also known as Mars yellow, Pigment yellow 42, 43), [38] hydrated ferric oxide (Fe 2 O 3 ·H 2 O), is a naturally occurring pigment found in clays in many parts of the world. It is non-toxic and has been used in painting since prehistoric times. [39] Indian yellow is a
Arsenic pigments. Orpiment: natural monoclinic arsenic sulfide (As 2 S 3).; Bismuth pigments. Primrose yellow (PY184): bismuth vanadate (BiVO 4). Cadmium pigments. Cadmium yellow (PY37): cadmium sulfide (CdS), which also occurs as the mineral greenockite.
Xanthophylls (originally phylloxanthins) are yellow pigments that occur widely in nature and form one of two major divisions of the carotenoid group; the other division is formed by the carotenes. The name is from Greek: xanthos ( ξανθός ), meaning "yellow", [ 1 ] and phyllon ( φύλλον ), meaning "leaf"), [ 2 ] due to their formation ...
Lutein is a yellow pigment found in fruits and vegetables and is the most abundant carotenoid in plants. Lycopene is the red pigment responsible for the color of tomatoes . Other less common carotenoids in plants include lutein epoxide (in many woody species), lactucaxanthin (found in lettuce), and alpha carotene (found in carrots).
One common diarylide yellow pigment is Pigment yellow 12. From the selection of diarylide yellow pigments shown below one can appreciate the subtle changes in the substituents. Worldwide production of organic pigments was estimated to be about 250,000 metric tons (t) in 2006, with about 25%, or 62,500 t, being diarylide yellows. [3]
Naples yellow is a saturated yellow, occasionally with pink or off-white hues. [9] It has a strong hiding power and effectively covers other pigments. [9] Temperature during production affects its hue.
This causes the compounds to be deeply colored yellow, orange, or red. Carotenoids are the dominant pigment in autumn leaf coloration of about 15-30% of tree species, [3] but many plant colors, especially reds and purples, are due to polyphenols. Macular pigments of the human eye
Bismuth vanadate is a bright yellow powder and may have a slight green tint. When used as a pigment it has a high Chroma and excellent hiding power. In nature, bismuth vanadate can be found as the mineral pucherite, clinobisvanite, and dreyerite depending on the particular polymorph formed.