Dyes

Red Dye 1 Red dye 1 is most likely a polar covalent molecule since we have found that it dissolves into water but does not break apart into ions. Just because it dissolves in water does not make it solely polar covalent, but since it has a relatively low conductivity, 534 mS/cm in the 0-20000 range, then it most likely is polar covalent. This is further confirmed with the fact that it does not react with NaOH, NaCl, or AgNO3, all ionic substances. The red dye does not react with NaOH since…

Cachou de Laval: This was the first sulfur dye. It is obtained by heating brown coal in a rotary baker with sodium polusulfide and sulfur. It is also made by heating organic refuse with sulfur and sodium sulfide at temoeratures varying from 100⁰-350⁰C. The higher the temperature, the darker the product. Other alternatives intermediates are lignite, sawdust, bran, sulfite cellulose waste liquors (free from calcium), oils, fats and fatty acids. It appears as black hygroscopic lumps or powder. It…

“Isolation doesn't bother me at all. It gives me a sense of security” (Page). This quote reflects the theme of isolation in the novels Catcher in the Rye and Into the Wild. Both novels express isolation through the characters of Chris McCandless and Holden Caulfield. However, only Holden, the main character in Catcher in the Rye, uses alienation as a form of self protection. Holden is protecting himself from the thought of growing up, something he fears. He is scared to face his problems and…

If a dye is more soluble in the solvent, it will rise farther up the paper through capillary action. The solubility of identical dyes is always the same when exposed to the same solvent. Because of this, Rf values of identical dyes are always the same (Davis et al, 2009). This means that if the dyes used in Skittles Sweets and Sours and Crayola markers of the same color were identical, their Rf values would have to be nearly the same. We calculated five Rf values for each dye that was found…

work on histological dye staining, though, started not before the second half of 19th century in which carmine or cochineal was the most used dye. General stains will dye the tissue uniformly while selective stains will dye only the tissue components in which they have natural affinity for. Dyes can be roughly divided into acidic dyes and basic dyes. Basic dyes stain acidic components while acidic dyes stain basic components. P. Ehrlich used a method for mixing acidic and basic dyes that has…

The purpose of this experiment was to discover if Crayola Washable Markers are really nontoxic, or even as safe as the dyes used in food. To answer this question, we used paper chromatography to identify the dyes in blue, orange, and green Skittles Sweets and Sours candy and Crayola Washable Markers. In this paper chromatography experiment, the mixture to be separated was spotted 1.5 centimeters from the bottom of chromatography paper, which was then dipped in the solvent, a 0.1 percent salt…

0.20 g of adsorbent was added to 20 mL of 50 mg/L dye solution and Vortex at 150 rpm for various time intervals at 5, 10, 15, 30, 60, minutes. The above steps were repeated using dye concentrations of 100, 150 and 200 mg/L dye solutions. Adsorbent dosage is an important parameter because it determines the capacity of adsorbent for a given initial concentration of dye molecules. Then their % absorbance’s were calculated by spectrophotometer (λmax=410) and thus amount adsorbed were calculated.…

To investigate which food dye color were present in the low-calorie Gatorade, a small sample of the Gatorade was inserted into a UV-Vis spectrometer to examine which color was being absorbed and reflected. There were two peaks, where the two colors were being the most absorbed. Once the absorbance was figured out, the food dyes that is needed in the Gatorade was present by using the color spectrum and the wavelength. These colors were green (514 nm) and orange (629.6 nm). Then the emitting…

equipment will be needed: Apparatus chamber Orange dye Purple dye Red dye Blue 1 dye Dye mixture Blue…

want to dye your hair. It is better to do a little research to see what the hair color would look like on your skin tone. After you decide what color you want, you need to decide which brand you want. Different brands have different effects on hair. You should go to a beauty supply store where there are a ton of different brands of hair dye. Try to avoid hair dye with pneumonia. Pneumonia can damage your hair and make it extremely fragile and fuzzy. After you have purchased your hair dye and…