fluorescent whitening agent AT - Names and Identifiers
fluorescent whitening agent AT - Physico-chemical Properties
Molecular Formula | C14H11O3N
|
Molar Mass | 241 |
Physical and Chemical Properties | This product is yellow crystal, insoluble in water. It is non-ionic, but cationic in acidic solution. |
Use | This product is used for whitening acrylic, acrylic, and polyester blends, with good light and wash fastness, and can be used in the same bath with sodium chlorite. It is also used for whitening treatment of acrylic/wool, acrylic/cellulose fiber blended fabrics, and other synthetic fibers. |
fluorescent whitening agent AT - Preparation method
Open Data Verified Data
1. 30kg of water, 30kg of 40% methylamine, and 40kg of 4-chloronaphthalene-1,8-dicarboxylic anhydride were sequentially put into a reactor, heated to reflux, and subjected to N-methylation reaction. After 1 hour of reaction, the reaction was reduced to room temperature, and a yellow slurry, N-methyl-4-chloro-1,8-naphthalimide, was obtained through filtration. The pure product was obtained by recrystallization with acetic acid, with a melting point of 166-168 ℃.
2. Transfer 30kg of the above-mentioned high-quality product into the reaction kettle, add 60kg of 30% sodium methoxide/methanol solution, stir and heat until reflux, and react for 4-5 hours. Filter while hot, if too thick, add a certain amount of methanol to dilute before filtering, drying, and recrystallizing to obtain a high-quality product.
Last Update:2023-12-21 12:58:12
fluorescent whitening agent AT - safety
Open Data Verified Data
This product can be managed according to general industrial chemicals. When using it, gloves and protective glasses should be worn to avoid direct contact with the skin and eyes. If it gets on the skin, rinse with water and soap. Place in a cool and dry warehouse to prevent exposure to sunlight and rain.
Last Update:2023-12-21 12:58:21
fluorescent whitening agent AT - Introduction
N-methyl-4-methoxy-1, 8-naphthalimide is an organic compound with the chemical formula C12H13NO2. The following is an introduction to its nature, use, preparation and safety information:
Nature:
N-methyl -4-methoxy -1,8-naphthalimide is a white crystalline solid with a special odor. It has a melting point of about 80-82 degrees Celsius and can be dissolved in organic solvents such as alcohols, esters and chlorinated hydrocarbons.
Use:
N-methyl -4-methoxy -1,8-naphthalimide is a commonly used organic synthesis intermediates, widely used in drug synthesis, dye synthesis and other fields. It can be used as a precursor of diacetals for the synthesis of a variety of organic compounds, such as methyl naphthoate.
Preparation Method:
N-methyl -4-methoxy -1,8-naphthalimide has many preparation methods, one of which is commonly used by reacting methyl compounds with 4-methoxy -1,8-naphthalenone. The specific preparation process can refer to the organic synthesis manual or related research literature.
Safety Information:
N-methyl-4-methoxy-1, 8-naphthalimide is generally stable and safe under normal conditions of use. However, it may have an irritating effect on the eyes, skin and respiratory system. Therefore, appropriate protective measures should be taken during use, such as wearing chemical protective gloves, goggles and masks. At the same time, avoid inhaling its dust or solution, avoid contact with skin and eyes. In the process of treatment, it is necessary to follow good laboratory operation specifications and maintain good ventilation conditions. In the event of accidental spills or aspiration, immediately clean and seek medical help.
Last Update:2024-04-09 21:11:58