Fluorescent whitening agent is a compound with high quantum efficiency, which can effectively whiten this white or white substrate (such as textiles, paper, plastics, paint). Fluorescent whitening agent is a functional additive in clothing detergents. Many clothes are yellowed in the process of wearing and using due to various reasons, so that the whiteness of white clothes decreases and colorful clothes are no longer bright. Adding fluorescent whitening agent into clothing detergent can make clothing restore the original whiteness and color as much as possible. Therefore, fluorescent whitening agents are widely added to laundry detergents at home and abroad. In China, there are two types of laundry detergents with and without fluorescent whiteners, and companies usually position their products according to consumer demand and market conditions.

Now, many consumers are skeptical about why the amount of additives is not specified in the product standards for laundry products. This is because, first of all, the addition of fluorescent whitening agent itself is ****, while the addition of fluorescent whitening agent clothing detergent is a "self-limiting" products, that is, due to the technical requirements of their formulations, detergents with fluorescent whitening agent can only be added to the micro-addition, if the excess added to the effect of not only can not increase the washing effect, but also make the clothing yellow; Secondly, due to the high price of fluorescent agent (the cost of the product), the price of the product is very high. Due to the expensive price of fluorescent agent (e.g., CBS price is usually around 180,000 yuan/ton), it also restricts the enterprises to add the amount in the formula. This is the reason why Europe, America and Japan and other developed **** also use the non-specified additive amount. China's clothing detergent products are generally added in the amount of 0.02% -0.4%, compared with Europe and the United States and Japan is slightly lower or equivalent. So there is no provision for the amount of fluorescent whitening agent in the standard, and by the same token, there is no provision for the use of fluorescent whitening agent on the outer label of the product. Experts conclude through scientific evidence that fluorescent whitening agents for detergents are friendly to the human body **** and the environment. The acute toxicity of fluorescent whitening agents for detergents is comparable to that of table salt, and they are not irritating to the skin, will not be absorbed through the skin, and will not cause skin allergies.