| Name | fluorescent bleaches R |
| Synonyms | Fluorescent whitening agent R |
| Molecular Formula | C28H22N4Na2O8S2 |
| Molar Mass | 620.56 |
| Appearance | White to light yellow powder |
| Physical and Chemical Properties | Chemical quality This product is a light yellow powder, easily soluble in water, and is anionic. |
| Use | Uses for fiber, paper, white printing and dyeing whitening light-colored fiber brightening. |
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.
Add 495kg of DSD acid to the condensation kettle and stir with 30% NaOH aqueous solution to dissolve. Add 370kg of phenyl isocyanate in batches under stirring for condensation reaction. After the reaction is completed, add 3kg Na2CO3 to adjust the pH value, then add 530kg of refined salt for salting out, cooling, crystallization, filtration, and vacuum drying. Mix a certain amount of sodium sulfate and grind to obtain the product.
495kg DSD acid was added to the condensation kettle. Add 30% NaOH aqueous solution and stir to dissolve. 370 kg of phenyl isocyanate was added in batches under stirring for condensation reaction. After the reaction, add 3kg Na2CO3 to adjust the pH value, add 530 kg of refined salt for salting out, cooling, crystallization, filtration and vacuum drying. Mix in a certain amount of sodium sulfate and grind the product.