Lithol Rubine BK
Pigment Rubine, Carmine 6B, Brilliant Carmine 6B, Permanent Rubin L6B, Litholrubine, Latolrubine, C.I. Pigment Red 57, C.I. Pigment Red 57:1, D&C Red No. 7, or C.I. 15850:1; E180
Molecular formula C
18H 12CaN 2O 6S
Molar mass 424.44 g/mol
Solubility in water slightly soluble in hot water, insoluble in cold water and ethanol
Except where noted otherwise, data are given for materials in their
standard state (at 25 °C (77 °F), 100 kPa)
(verify) (what is: / ?)
Lithol Rubine BK is a reddish synthetic azo dye. It has the appearance of a red powder and magenta when printed. It is slightly soluble in hot water, insoluble in cold water, and insoluble in ethanol. When dissolved in dimethylformamide, its absorption maximum lies at about 442 nm. It is usually supplied as a calcium salt. [1 ]
It is used to dye
plastics, paints, printing inks, and for textile printing. It is normally used as a standard magenta in the three and four color printing processes.
When used as a
food dye, it has E number E180. It is used to color cheese rind as well as a component in some lip balms. It is banned in some countries.
References [ edit ]
^ K. Hunger. W. Herbst "Pigments, Organic" in Ullmann's Encyclopedia of Industrial Chemistry, Wiley-VCH, Weinheim, 2012. doi: 10.1002/14356007.a20_371