Product Group: Reactive Dyes
CI Name | CAS number: Reactive Blue 49
Molecular Formula: C32H23ClN7Na3O11S3
Molecular Weight: 882.183
Synonyms: Blue P3R, Blue H3RP, Blue PN2R
Boiling point: 379.8 °C
Resistance: Acid Resistance
Solvent Color: Blue
Moisture (%): 12-15%
Abstract:- A biosorbent was developed by mixing the macro-fungus Agaricus bisporus and Thuja orientalis cones and successfully used for the biosorption of Reactive Blue 49 (RB49) dye. The biosorbent system was evaluated in batch and continuous biosorption process. A series of batch studies was carried out to identify the optimum biosorption conditions such as pH, biosorbent dosage and equilibrium time. The biosorption process followed the pseudo-first-order and the pseudo-second-order kinetic models and the Freundlich, Langmuir and Dubinin–Radushkevich (D–R) isotherm models at different temperatures. The maximum biosorption capacity of the mixed biomass system was 1.85 × 10−4 mol g−1 at 45 °C. The negative ΔG° values and the positive ΔH° values indicated that the biosorption process was spontaneous and endothermic. The dynamic flow biosorption potential of the biomass system was investigated as a function of the flow rate, column size and inlet solute concentration. FTIR and SEM analysis were used to characterize the biosorbent and biosorption mechanism. The functional groups such as carboxyl, amine, amide and hydroxyl on the biosorbent surface may be responsible for RB49 biosorption. In combination, our results suggest that this eco-friendly and economical biomass system may be useful for the removal of contaminating reactive dyes.
Six different types of paper with different textures or gloss and the same grammage were printed upon with three commercial reactive dyes, i.e. C.I. Reactive Blue 49 (Ink 1, 4), C.I. Reactive Blue 21 (Ink 2, Ink 5) and C.I. Reactive Blue 19 (Ink 3, Ink 6), which are based on different reactive groups, chromophores and possess different numbers of anionic groups. Ethylene glycol mono butyl ether (Ink1 to Ink 3) and Ethylene glycol di-butyl ether (Ink 4 to Ink6) were used in ink formulation as penetrants. Optical density, colorimetric properties, wash and light fastness of the printed papers were evaluated. The results indicated that the printed subjects with Ink 1 to Ink 3 had less optical density, high dye penetration and good wash fastness properties compared to Ink 4 to Ink 6. Ink 2 and Ink 5 showed excellent wash and light fastness on the most of the substrates compared to other inks. A higher optical density of printed images is obtained by using glossy substrates. Prog. Color Colorants Coat. 7(2014), 73-83 © Institute for Color Science and Technology.
Light Fastness: Light fastness test The light-fastness of the printed ink-jet media for specified periods of time is pertinent to the end use of these materials. The image stability is very dependent upon the wavelength distribution of the exposing illumination. The end use of printed subjects is indoor home lighting condition. Therefore, this practice is intended to produce the color changes that may occur in ink-jet prints upon exposure to irradiation from xenon arc lamp. The accelerated procedure implemented in this practice is intended to provide a means for the rapid evaluation of light fastness under laboratory conditions. The color change of the patches before and after exposing to light computed by CIELAB 1976 color difference formula, was shown as a measure of light fastness.
Reactive dyes as The colorimetric properties of ink-jet prints
The colorimetric properties of ink-jet prints To investigate the influence of the structure of reactive dyes on the printing of paper, three blue reactive dyes, which are based on mono-chlorotriazinyl or vinyl sulfone reactive group but differ in chromophore structure and numbers of sulphonic acid were employed; C.I. Reactive blue 49(Ink 1), and C.I. Reactive blue 21 (Ink 2) and C.I. Reactive blue 19(Ink 3).