What is a fluorescent whitening agent
Fluorescent whitening agent (FWAs) is a kind of optical brightening agent, whitening whitening principle is different from the chemical oxidation, but by absorbing the environment, the ultraviolet ray in emit fluorescence blue purple, again with need whitening of substrate release of superposition of yellow light wavelengths, formation, give a person the sense with white products, at the same time also can increase the brightness of the product.FWAs the superior characteristics make it widely used in textile, paper, synthetic detergent, such as production area, due to the complex FWAs is a kind of structure of organic compounds, once combined with certain proteins in the body, it is difficult to through the normal metabolism of eduction body outside, fluorescent whitening agent will weaken the human body resistance, at the same time cause the wound to heal, once FWAs accumulation to a certain concentration in human body, may cause cancer.At present, the world's production FWAs about 15 categories (not including derivative product relative to its fluorescence properties), according to their chemical structure can be divided into styrene triazine amino 2, pyrazole Lin, naphthalene formyl imide, benzene and oxazole and coumarin, and so on, a lot of literature at home and abroad reported food wrappers FWAs abuse problems.
What is a fluorescent whitening agent
