In daily life, we are generally inseparable from the use of washing powder or laundry detergent. Reports on the presence of fluorescent agents in laundry detergents/washing detergents are always a source of concern. So, does the laundry/washing powder have a fluorescent agent? What scientific methods allow us to accurately distinguish whether or not they contain a fluorescent agent?
Does the laundry/washing powder have a fluorescent agent?
    A fluorescent whitening agent or optical brightener is a compound with a very high quantum efficiency, which can be used on a white or white matrix (such as textiles, paper, plastics, paints) on the order of one million to one hundred thousandths. Effectively whiten. It can absorb ultraviolet light with a wavelength of about 340~380nm and emit blue light with a wavelength of about 400~450nm, which can effectively compensate for the yellowing caused by the blue light defect of the white matter, and visually improve the whiteness and brightness of the white substance.
    The fluorescent whitening agent itself is colorless or light yellow (green) color, and the whitening agent has a cyclic conjugated system in chemical structure, for example, a stilbene derivative, a phenylpyrazoline derivative, which has been industrially produced. Fluorescent whitening agents have 15 basic structural types and nearly 400 chemical structures. The largest class of fluorescent whitening agents in China are VBL, CXT and liquid brighteners for papermaking. Generally, whitening agents are classified into two types, one being a water-soluble whitening agent and the other being a water-insoluble brightener. The former can be used as a whitening agent for paper, paint, washing powder and laundry detergent. The latter can be used for whitening of chemical fibers, plastics, and the like. Therefore, the washing powder and the laundry liquid contain fluorescent agents.
How can I identify products with fluorescent agents?
    Irradiated with a violet light (Purple Light 365), the daily necessities containing the fluorescent agent are bright blue, and the dark purple is not contained. Baby clothes, diapers, masks should try to avoid buying products containing fluorescent agents. It is generally no problem to buy regular manufacturers' daily necessities through formal channels.
    Through the introduction of the above washing powder with a fluorescent agent, we should have a certain method of identification for products with fluorescent agents, and I hope to help everyone.
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