Direct Fast Yellow RR - Names and Identifiers
Direct Fast Yellow RR - Physico-chemical Properties
| Molecular Formula | C28H18N4O6S4.2Na
|
| Physical and Chemical Properties | Yellow-brown powder. Soluble in water, the aqueous solution was golden yellow, and the color did not change after adding concentrated hydrochloric acid or concentrated sodium hydroxide. Slightly soluble in ethanol, lemon yellow. In concentrated sulfuric acid in red light brown, diluted to yellow. When dyeing copper, iron ion color light slightly changed, there is a good stability of chlorine resistance, resistance to the reduction of white powder and sulfide alkali. |
Direct Fast Yellow RR - Introduction
Direct Resistant Yellow RR, also known as Yellow 3G, is an organic synthetic dye. Its nature is as follows:
1. Appearance: Direct sun-resistant yellow RR is a yellow pigment that exists in powder form.
2. sun fastness: the dye has good sun fastness, is stable to sunlight and ultraviolet rays, and is not easy to fade.
3. Solubility: Direct sun-resistant yellow RR has good solubility in water and can also be dissolved in some organic solvents.
4. Temperature resistance: The dye can maintain its color stability at higher temperatures.
use, direct resistant to yellow RR commonly used in fiber dye industry and printing and dyeing industry. It can be used to dye fibers, textiles and leather, and can give products a bright yellow color or an auxiliary dye.
on the preparation method, the main preparation process of direct sun-resistant yellow RR includes the reaction of phenylamine and dehydrated hydrochloric acid, then the oxidation reaction of potassium dichromate, and finally the acid-base balance treatment to obtain the product.
In terms of safety information, the Direct Yellow RR is generally safe under normal use and processing conditions. However, as with any chemical substance, operators should follow safe operating procedures and avoid inhalation, ingestion and contact with skin or eyes. When using this dye, it is recommended to wear appropriate personal protective equipment, such as gloves and protective glasses. If exposed or inhaled, seek medical attention immediately.
Last Update：2024-04-10 22:31:16