Indanthrene blue RS
Encyclopedia
Indanthrene blue RS is a synthetic anthraquinone
dye
. It has the appearance of blue needles with metallic lustre and melting point of 470-500 °C. It is known by a host of other names, see right.
When used as a food dye, it has E number
E130.
Indanthrene Blue RS was patented in 1901 by Rene Bohn as the first anthraquinone
vat dye
, one of the dyes with very good fastness to light and washing. It is used to dye unmordant
ed cotton
and as a pigment
in quality paints and enamel
s.
Anthraquinone
Anthraquinone, also called anthracenedione or dioxoanthracene is an aromatic organic compound with formula . Several isomers are possible, each of which can be viewed as a quinone derivative...
dye
Dye
A dye is a colored substance that has an affinity to the substrate to which it is being applied. The dye is generally applied in an aqueous solution, and requires a mordant to improve the fastness of the dye on the fiber....
. It has the appearance of blue needles with metallic lustre and melting point of 470-500 °C. It is known by a host of other names, see right.
When used as a food dye, it has E number
E number
E numbers are number codes for food additives that have been assessed for use within the European Union . They are commonly found on food labels throughout the European Union. Safety assessment and approval are the responsibility of the European Food Safety Authority...
E130.
Indanthrene Blue RS was patented in 1901 by Rene Bohn as the first anthraquinone
Anthraquinone
Anthraquinone, also called anthracenedione or dioxoanthracene is an aromatic organic compound with formula . Several isomers are possible, each of which can be viewed as a quinone derivative...
vat dye
Vat dye
Vat dyes are an ancient class of dyes, based on the natural dye, indigo, which is now produced synthetically.-Overview:The process "vat dyeing" refers to dyeing in a bucket or vat. It can be performed whenever a liquid, even shade over the entire garment is desired. Almost any dye can be used,...
, one of the dyes with very good fastness to light and washing. It is used to dye unmordant
Mordant
A mordant is a substance used to set dyes on fabrics or tissue sections by forming a coordination complex with the dye which then attaches to the fabric or tissue. It may be used for dyeing fabrics, or for intensifying stains in cell or tissue preparations. The term mordant comes from the Latin...
ed cotton
Cotton
Cotton is a soft, fluffy staple fiber that grows in a boll, or protective capsule, around the seeds of cotton plants of the genus Gossypium. The fiber is almost pure cellulose. The botanical purpose of cotton fiber is to aid in seed dispersal....
and as a pigment
Pigment
A pigment is a material that changes the color of reflected or transmitted light as the result of wavelength-selective absorption. This physical process differs from fluorescence, phosphorescence, and other forms of luminescence, in which a material emits light.Many materials selectively absorb...
in quality paints and enamel
Vitreous enamel
Vitreous enamel, also porcelain enamel in U.S. English, is a material made by fusing powdered glass to a substrate by firing, usually between 750 and 850 °C...
s.