Description

4,4'-Bis[[4-Chloro-6-[Bis(2-Hydroxyethyl)Amino]-S-Triazin-2-Yl]Amino]-2,2'-Stilbenedisulfonic Acid is a high-performance, reactive fluorescent whitening agent (FWA) belonging to the triazinylaminostilbene class. Its core value lies in its exceptional ability to absorb ultraviolet light and re-emit it as visible blue light, thereby compensating for yellowing and significantly enhancing the brightness and whiteness of treated materials. This compound is essential for manufacturers in the textile, paper, detergent, and plastics industries seeking to achieve superior optical brightening effects. Its reactive chlorotriazine groups enable covalent bonding to substrates like cellulose fibers, ensuring excellent wash-fastness and durability.

Application

• Textile Finishing: Primary use as a durable optical brightener for cotton, viscose, and other cellulose-based fabrics, providing high whiteness and brilliance with excellent fastness to washing and light.
• Paper Manufacturing: Key additive in high-quality writing, printing, and specialty papers to achieve a bright, white appearance and improve print contrast.
• Detergent & Laundry Care: Critical component in premium laundry detergents and fabric softeners to make white fabrics appear whiter and colored fabrics look brighter after washing.
• Plastics and Polymers: Used in the production of plastics, synthetic fibers (like polyamide), and coatings to inhibit yellowing and enhance visual appeal.
• Soaps and Personal Care: Incorporated into soaps and certain personal care formulations to improve perceived cleanliness and brightness.
• Advanced Material Coatings: Applied in coatings for specialty papers and certain industrial materials requiring optical enhancement.

Basic Information

Item	Details
Product Name	4,4'-Bis[[4-Chloro-6-[Bis(2-Hydroxyethyl)Amino]-S-Triazin-2-Yl]Amino]-2,2'-Stilbenedisulfonic Acid
CAS No.	50570-59-7
Molecular Formula	C34H38Cl2N12O10S2
Molecular Weight	909.78 g/mol
Synonyms	Fluorescent Brightener 220 (FBA 220); Tinopal CBS-X; 2,2'-(1,2-Ethenediyl)bis[5-[[4-chloro-6-[bis(2-hydroxyethyl)amino]-1,3,5-triazin-2-yl]amino]benzenesulfonic acid]; 4,4'-Bis(4-chloro-6-diethanolamino-1,3,5-triazin-2-yl)amino-2,2'-stilbenedisulfonic acid; CBS-X; Optical Brightener CBS-X; Disodium 4,4'-bis[[4-chloro-6-[bis(2-hydroxyethyl)amino]-1,3,5-triazin-2-yl]amino]stilbene-2,2'-disulfonate
EINECS	256-599-6

Quality Control

Our production of 4,4'-Bis[[4-Chloro-6-[Bis(2-Hydroxyethyl)Amino]-S-Triazin-2-Yl]Amino]-2,2'-Stilbenedisulfonic Acid adheres to stringent quality management protocols. Every batch undergoes rigorous analytical testing, including HPLC for purity and assay, spectrophotometry for strength and shade, and checks for key impurities. We provide comprehensive Certificates of Analysis (COA) with each shipment, detailing all relevant specifications to ensure batch-to-batch consistency and performance reliability for your critical applications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). Due to its hygroscopic nature, the container must be kept tightly sealed after opening to minimize exposure to atmospheric moisture, which can affect product performance. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Light yellow to yellow powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture (KF)	≤ 5.0%
Ash Content	≤ 0.5%
Fluorescent Strength	100 ± 5% (vs. Standard)
Shade	Standard Blue Whitish
Solubility (in Water)	Clear, yellow solution

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.