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Litholrubine BK is a reddish synthetic azo dye.
Litholrubine BK has the appearance of a red powder and is magenta when printed.
Litholrubine BK is slightly soluble in hot water, insoluble in cold water, and insoluble in ethanol.
CAS: 5281-04-9
MF: C18H16CaN2O6S
MW: 428.47
EINECS: 226-109-5
Synonyms
3-Hydroxy-4-[(4-methyl-2-sulfophenyl)azo]-2-naphthalenecarboxylic acid calcium salt (1:1);Brilliant Carmine 6BN;Brilliant Carmine 6BY;Lithol Rubine B;Pigment Red 57:1;Pigment Red 57-1;2-Naphthalenecarboxylic acid, 3-hydroxy-4-(4-methyl-2-sulfophenyl)azo-, calcium salt (1:1);Pigment -- Pigment Red 57:1
When dissolved in dimethylformamide, Litholrubine BK's absorption maximum lies at about 442 nm.
Litholrubine BK is usually supplied as a calcium salt.
Litholrubine BK is prepared by azo coupling with 3-hydroxy-2-naphthoic acid.
Litholrubine BK is used to dye plastics, paints, printing inks, and for textile printing.
Litholrubine BK is normally used as a standard magenta in the three and four color printing processes.
When used as a food dye, Litholrubine BK has E number E180.
Litholrubine BK is used to color cheese rind, and it is a component in some lip balms.
Litholrubine BK, also known as Diketopyrrolopyrrole (DPP) red, is an organic pigment characterized by its vibrant red hue and excellent lightfastness, making it suitable for various applications in coatings, plastics, and inks.
Litholrubine BK is a synthetic pigment derived from the diketopyrrolopyrrole structure, which contributes to its stability and resistance to fading when exposed to UV light.
Litholrubine BK exhibits high tinting strength and opacity, allowing for effective coloration even at low concentrations.
Additionally, Litholrubine BK is known for its good chemical resistance and compatibility with a range of binders and solvents, enhancing its versatility in formulations.
Litholrubine BK is generally considered safe for use in various applications, although specific regulations may apply depending on the intended use and region.
Overall, Litholrubine BK is valued for its aesthetic qualities and performance characteristics, making it a popular choice in the pigment industry.
Litholrubine BK Chemical Properties
density: 0.352-1.7[at 20℃]
vapor pressure: 0Pa at 25℃
form: powder to crystal
Colour Index: 15850
color: Red to Dark red to Brown
Water Solubility: 8.9mg/L at 25℃
Major Application: cleaning products
cosmetics
food and beverages
personal care
Cosmetics Ingredients Functions COLORANT
HAIR DYEING
InChI: 1S/C18H14N2O6S.Ca/c1-10-6-7-14(15(8-10)27(24,25)26)19-20-16-12-5-3-2-4-11(12)9-13(17(16)21)18(22)23;/h2-9,19H,1H3,(H,22,23)(H,24,25,26);/q;+2/p-2/b20-16-;
InChIKey: WANIKCLUTOABTP-LRZQPWDCSA-L
LogP: 0.65-2.4 at 23-25℃
CAS DataBase Reference: 5281-04-9(CAS DataBase Reference)
EPA Substance Registry System: Litholrubine BK (5281-04-9)
Characteristics
Litholrubine BK is one of the most important organic pigments and an important printing ink pigment.
Litholrubine BK has a brilliant shade that corresponds to the standard “magenta”shade of the European scale for multicolor, letterpress, and offset printing, as well as high tinting strength, good lightfastness, and solvent resistance.
Uses
Litholrubine BK is one of the most important organic pigments and an important printing ink pigment.
Litholrubine BK is used in almost all printing ink sectors (in letterpress and offset printing, and in illustration and packaging gravure printing) for several reasons.
Litholrubine BK has a brilliant shade that corresponds to the standard “magenta” shade of the European scale for multicolor, letterpress, and offset printing, as well as high tinting strength, good lightfastness, and solvent resistance.
