fluorescent whitening agent OM - Names and Identifiers
fluorescent whitening agent OM - Physico-chemical Properties
| Molecular Formula | C19H12O2
|
| Molar Mass | 272 |
| Physical and Chemical Properties | This product is light yellow crystalline powder. Melting point 144 °c. Insoluble in water, insoluble in ethanol, soluble in benzene, toluene and other aromatic solvents. |
| Use | This product is used for whitening polyester, acetate fiber, and other synthetic fibers. |
fluorescent whitening agent OM - 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：2023-10-20 11:19:01
fluorescent whitening agent OM - https://fanyi.baidu.com/#zh/en/制法
Open Data Verified Data
1. Add 30kg of acetic acid to the reactor and add 22kg with stirring β- Naphthol and 23.8kg of hexamethylenetetramine were heated to 90 ℃, and 33kg of 98% concentrated sulfuric acid was added dropwise. After addition, react at 95-98 ℃ for 2 hours. After cooling, add 250kg of water, dilute, let stand, crystallize, filter, wash the filter cake with water until neutral, and dry at 50 ℃ to obtain 2-hydroxy-1-naphthalene formaldehyde.
2. Add the above products to the cyclization reactor, while adding 39kg of acetic anhydride and 18.5kg of sodium phenylacetate. Stir and raise the temperature to 145 ℃, react for 5-6h, and then cool to about 110 ℃. Add 100kg of water. Stir well and heat filter at 80 ℃, wash the filter cake with hot water, and dry at 50-60 ℃. Crushed fluorescent whitening agent OM.
Last Update：2024-01-02 23:10:35
fluorescent whitening agent OM - Introduction
3-Phenyl -5, 6-benzocoumarin is an organic compound with the chemical formula C20H14O2. Its properties are as follows:
1. Appearance: 3-phenyl -5, 6-benzocoumarin is a light yellow crystalline solid.
2. Solubility: It is almost insoluble in water, but can be dissolved in organic solvents such as ethanol and dimethylformamide.
3. Melting Point: The melting point of 3-phenyl -5, 6-benzocoumarin is about 145-147°C.
4. chemical properties: it is a kind of aromatic compounds, has a strong fluorescence properties.
3-phenyl -5, 6-benzocoumarin has a certain application value in the field of biomedicine, in which its main uses are as follows:
1. fluorescent probe: due to its strong fluorescence properties, 3-phenyl -5, 6-benzocoumarin is often used as a fluorescent probe for biological analysis, cell imaging and drug delivery.
2. Natural product synthesis: It can also be used to synthesize natural products, such as the synthesis of active ingredients, the study of stimulating substances, etc.
3. Organic synthesis intermediate: 3-phenyl -5, 6-benzocoumarin as an intermediate of organic synthesis, can be used for the synthesis of various organic compounds.
The method for preparing 3-phenyl -5, 6-benzocoumarin is generally by reacting benzaldehyde with 5,6-dihydrobenzocoumarin under alkaline conditions, and performing a condensation reaction to obtain the target product.
Regarding safety information, 3-phenyl -5, 6-benzocoumarin is generally considered to have low toxicity under normal use conditions and is irritating to the skin and eyes. It is necessary to pay attention to protective measures when using, avoid direct contact with skin and eyes, and pay attention to avoid inhaling dust. For detailed guidance on their safe operation, it is recommended to refer to the safety data sheets of the relevant chemicals.
Last Update：2024-04-09 21:21:28