-
Anonymous users2024-02-11Acid Red 18 is a red to dark red powder with an aqueous solution that is red and odorless. Soluble in water, soluble in glycerol, slightly soluble in ethanol, insoluble in oil. The light resistance and acid resistance are good, the citric acid and tartaric acid are stable, the bacterial resistance is poor, and the heat resistance and reduction resistance are quite poor.
Turns brown in an alkaline solution. Maximum absorption wavelength (508-2) nm.
Toxicity: oral LD50 >8000 mg kg in rats, oral LD5019300 mg kg in mice, ADI 0-4 mg kg (FAO, 1994).
Uses: Mainly used for dyeing wool, silk, nylon and printing of wool and silk fabrics. Poor fastness. It can also be used to color paper, leather, soap, etc. It can also be used as a colorant for food colorants, pharmaceuticals and cosmetics.
These are what I found in the chemical wave encyclopedia, if you want to know the properties of other chemicals, I suggest you can go to any chemical **** chemical encyclopedia page to search and view
-
Anonymous users2024-02-10Acid dyes. According to its chemical structure and different dyeing conditions, it is divided into strong acidic, weakly acidic, acidic medium, acidic complex dye, etc. Strong acid dye is the earliest developed acid dye, which requires dyeing in a strong acid dye bath, with a simple molecular structure, low molecular weight, and a sulfonic acid group or carboxyl group.
The affinity for wool is not large, it can be evenly moved on the wool and dyed evenly, so it is also called acidic leveling dye, but the color light is not deep, the washing fastness is poor, and the wool is damaged when dyed, and the wool feel after dyeing is poor. Such as Acid Red G (i.e. Acid Red 1). Weakly acidic dyes are generated in strongly acidic dyes by increasing molecular weight, introducing groups such as arylsulfone groups or introducing long carbon chains.
The molecular structure is more complex, the affinity for wool is larger, it can dye wool in weak acidic medium, there is no damage to wool, the color light is deeper, and the fastness is improved, but it is not uniform. Such as weakly acidic brilliant blue raw (i.e. acid blue 80). Acid medium dyes are treated with certain metal salts (such as chromium salts, copper salts, etc.) as mordants to form metal complexes on the fabric.
of acidic dyes. The mordant dyeing procedures are more complicated, but you can get dyes with better performance such as light resistance, washing resistance, and friction fastness, such as acid medium black T (i.e., medium black 11). Acid complex dyes are formed by complexing certain acid dyes with metals such as chromium and cobalt.
Soluble in water, its dyes have excellent lightfastness and lightfastness. Its dye matrix is similar to that of acidic medium dyes, but in the preparation of dyes, metal atoms have been introduced into azo dye molecules, and the ratio of metal atoms to dye molecules is 1:1, so it is also called 1:
1. Metal complex dyes. There is no need to use mordant for dyeing. Such as acid complex yellow gr (i.e. acid yellow 99).
A passport is a document for citizens to enter and leave the country and prove their nationality and identity abroad, which can protect the basic rights of citizens abroad. >>>More
"Liquid paraffin" generally refers to mineral oil, also known as paraffin oil, white oil. It is a mixture of refined liquid hydrocarbons obtained from petroleum, mainly saturated naphthenes and paraffin mixtures, ** often pressed and reduced pressure fractionation, solvent extraction and dewaxing, hydrorefining; >>>More
1. Shampoo and moisturize hair.
When washing your hair with beer, wash and dry your hair first, then wipe 1 8 of the whole bottle of beer evenly on your hair, and do some hand massage to make the beer penetrate the roots of your hair. After 15 minutes, rinse your hair with water and then use a wooden comb or horn comb to smooth your hair. The effective nutrients in beer have a good ** effect on preventing hair from drying out and falling out, and can also make hair shiny. >>>More
1.Metallurgical industry blows high-purity oxygen in the steelmaking process, and oxygen reacts with carbon and phosphorus, sulfur, silicon, etc., which not only reduces the carbon content of steel, but also helps to remove impurities such as phosphorus, sulfur and silicon. In addition, the heat generated during the oxidation process is sufficient to maintain the temperature required for the steelmaking process, so the oxygen blowing not only shortens the smelting time, but also improves the quality of the steel. >>>More
Flies can be used militarily to scout enemy secrets, and the larvae of large numbers of flies can be used as fodder or as a balancer to help maintain balance.