Fluorescent Brightener MST

Fluorescent Brightener MST, whose standardized name is Fluorescent Brightener MST-H, corresponds to C.I. Fluorescent Brightener 353. Its standard CAS number is 55585-28, which is explicitly defined in the Chinese chemical industry standard HG/T 3967-2007. Its molecular formula is C₄₀H₃₄N₁₂O₂₀S₆Na₆, with a relative molecular mass of approximately 1333-1334. This water-soluble anionic brightener primarily neutralizes yellow light in cellulose fibers, achieving whitening and color enhancement through optical effects.

This product exhibits excellent water solubility, dissolving in water at any ratio without sensitivity to hard water, ensuring convenient handling. Optimal whitening conditions require pH > 7 (alkaline). It delivers exceptionally high whiteness enhancement while demonstrating resistance to peroxide bleaching agents and stable performance in bleaching systems containing reducing agents. Some data indicates reduced yellowing after high-temperature setting. The product meets industry standards for high-quality assurance, with strict adherence to national chemical industry standards ensuring stable and reliable performance.

Fluorescent Brightener MST is an indispensable key additive in modern high-end materials industries, deeply integrated into manufacturing sectors demanding stringent performance and appearance requirements.

In the textile and synthetic fiber sector, it serves as the gold standard for whitening polyester (PET) and nylon fibers. Whether applied to yarns and cone yarns processed under high-temperature, high-pressure conditions, or to down-like cotton, microfiber, and premium sports fabrics demanding ultimate whiteness and vibrancy, MST delivers consistent and exceptional whitening effects. It is extensively used in manufacturing premium athletic wear, outdoor gear, luxury lingerie, high-end home textiles (such as bright white curtains and bedding), and industrial fabrics.

Within the plastics and polymer materials industry, MST holds equally significant importance. It is extensively used in engineering and general-purpose plastics demanding stringent color fastness and heat resistance. For instance: it imparts a crystal-clear, pristine white appearance to polystyrene (PS) and ABS resin products; ensures long-term resistance to yellowing in polycarbonate (PC) lampshades and optical components; and enhances the visual quality and weather resistance of PVC profiles, films, and polyolefin (e.g., PP, PE) products.

Furthermore, its exceptional performance extends to niche markets like specialty coatings, high-performance inks, and acetate fibers, delivering professional solutions for all high-value products requiring enduring brightness and superior visual performance. Choosing MST means infusing your product line with the core competitive edge of lasting brightness and reliable stability.

1. Dip-and-Roll Process: Prepare a working solution with Fluorescent Brightener MST at a concentration of 5–25 g/L. After dipping and rolling the fabric, control the liquid retention rate between 80% and 100%. Then dry and set at 160–180°C for 60 seconds.
2. Resin-Finishing Padding Process: Prepare the working solution by adding Fluorescent Brightener MST at a ratio of 5–25 g/L, simultaneously incorporating resin and the corresponding catalyst. After padding, pre-dry the fabric at 135°C for 60 seconds, followed by high-temperature fixation at 160–180°C for 60 seconds to complete the finishing process.

This product is sealed in plastic drums with net contents of 20kg, 25kg, or 60kg per drum. Store in a cool, dry, well-ventilated warehouse with ambient temperatures maintained between 5°C and 30°C. Shelf life is six months. Note: Do not store with other chemical raw materials prior to use to avoid compromising performance.