In daily life, have you ever wondered why some laundry detergents can make white clothes still “sparkle” after washing, as if they’ve been revitalized? This is thanks to a chemical raw material called “optical brightener agent CBS-X.” This seemingly ordinary white crystal is actually an indispensable “magic powder” in the daily chemical industry. Today, it has become a star product in the field of green manufacturing due to its excellent environmental performance .

What is the optical brightener CBS-X?

CBS-X, also known as disodium stilbene-biphenyl disulfonate, is a stilbene-biphenyl type optical brightener. Its working principle is not traditional “bleaching,” but rather it absorbs invisible ultraviolet light and converts it into soft blue-violet visible light. This blue light complements the yellowish light of the fabric itself, creating extremely high whiteness and brightness, giving old clothes a “factory fresh” look.

From a physical perspective, CBS-X typically appears as a yellow-green crystalline powder or granules with excellent water solubility: its solubility in cold water at 25°C can reach 25g/L, while its solubility in hot water at 95°C soars to 300g/L, making it easily adaptable to various washing environments such as cold and hot washing.

The “top student” among detergents

In the laundry detergent industry, CBS-X is hailed as one of the “best optical brighteners.” Its popularity stems primarily from the following core advantages :

1.Low dosage, high efficacy : CBS-X has extremely strong fluorescence intensity. Adding only 0.05%-0.2% to laundry detergent or powder achieves a significant whitening effect. Compared to traditional stilbene triazine optical brightener agents, its high efficiency means lower overall cost and resource consumption.

2.Extremely stable : This product exhibits excellent resistance to chlorine bleach and acids and alkalis, remaining stable even in bleaching environments containing sodium hypochlorite, classifying it as a bleach-resistant brightener . This means that during repeated washing, it can brighten clothing without causing yellowing or discoloration.

3.Wide fiber affinity : CBS-X has a good whitening effect on cellulosic fibers (such as cotton), polyamides (such as nylon), and protein fibers (such as wool and silk) at both room temperature and high temperature, making it extremely versatile.

Key Highlights: Working Together for Environmental Goodness

In response to consumers’ concerns about the environmental friendliness of optical brightener agents, CBS-X, with its green genes , has set a new benchmark for the industry.

Easily biodegradable and returning to nature,
modernly produced CBS-X boasts outstanding environmental performance. It is easily biodegradable and does not pollute the environment during use, fully meeting the urgent needs of modern society for environmentally friendly products and sustainable development concepts. Some products are even directly defined as environmentally friendly products due to their larger average particle size .

CBS-X’s safety has long been recognized globally, according to authoritative international certifications
. It has passed certifications from testing institutions in China, the United States, Japan, and the European Union. The China Cleaning Products Industry Association has also published articles on official channels providing a detailed explanation of the safety of optical brighteners.

Free of prohibited substances, protecting your health:

CBS-X molecules are chlorine-free and non-carcinogenic . Its quality indicators are strictly controlled for the content of harmful aromatic amines and heavy metals, ensuring safety for humans under recommended dosage and general use. It is even permitted for contact with food, further demonstrating its excellent safety profile.

More than just “whitening”, it’s a sustainable choice.

In response to concerns raised by some consumers regarding the safety of optical brighteners, industry experts have provided clear answers. As early as 2008, the industry standard QB/T 2953-2008 explicitly listed stilbene biphenyls (CBS-X) as a permitted category for use in laundry detergents. Furthermore, a risk assessment report from the European Detergents Association (AISE) also indicates that CBS-X used in detergents will not cause adverse effects on human health or the environment.

From an environmental perspective, CBS-X’s high efficiency means low dosage —only a very small amount is needed to achieve the desired effect, which directly reduces the overall consumption of chemical raw materials and the environmental footprint of industrial production processes.

Market Outlook: Green Wave Drives Growth

With global consumers increasingly demanding both “cleanliness” and “eco-friendliness,” the optical brightener market is experiencing steady growth. According to market research data, the market size of optical brightener CBS-X benefits from strong demand from the textile and detergent industries, and its prospects are promising.

Our company specializes in exporting optical brightener agents and has over ten years of experience. If you have any questions about optical brightener agents, please feel free to contact us.