Description

4-Chloro-4'-[6-Sodiooxysulfonyl-2H-Naphtho[1,2-D]Triazol-2-Yl]-2,2'-Stilbenedisulfonic Acid Disodium Salt is a high-purity, water-soluble fluorescent whitening agent (FWA) and optical brightener. This compound is engineered to absorb ultraviolet light and re-emit it as visible blue light, significantly enhancing the whiteness and brightness of treated materials. It is essential for manufacturers in the textile, paper, detergent, and plastics industries seeking to achieve superior visual quality and market appeal for their products.

Application

• Textile Whitening: Primary application for whitening and brightening natural and synthetic fibers like cotton, polyester, and polyamide.
• Paper and Pulp Industry: Used in high-quality paper production, including writing, printing, and tissue papers, to improve optical brightness.
• Detergent and Laundry Formulations: Incorporated into laundry detergents and fabric softeners to impart a "whiter-than-white" appearance to laundered fabrics.
• Plastics and Polymers: Applied in the manufacturing of plastics, especially PVC and polyolefins, to counteract yellowing and enhance brightness.
• Advanced Material Coatings: Used in coatings, paints, and inks where optical brightening effects are required for premium finishes.
• Cosmetic and Personal Care: Potential use in specific cosmetic formulations where a brightening or whitening effect is desired.

Basic Information

Item	Detail
Product Name	4-Chloro-4'-[6-Sodiooxysulfonyl-2H-Naphtho[1,2-D]Triazol-2-Yl]-2,2'-Stilbenedisulfonic Acid Disodium Salt
CAS No.	73926-94-0
Molecular Formula	C31H16ClN3Na2O9S3
Molecular Weight	767.09 g/mol
Synonyms	Fluorescent Brightener 220; FWA 220; Tinopal CBS-X; 4-Chloro-4'-[6-(sodiooxysulfonyl)-2H-naphtho[1,2-d][1,2,3]triazol-2-yl]-2,2'-stilbenedisulfonic acid disodium salt; 2,2'-(1,2-Ethenediyl)bis[5-[4-chloro-6-[(2-sulfooxyethyl)sulfonyl]-1,3,5-triazin-2-yl]amino]benzenesulfonic acid disodium salt (related structure); Optical Brightener OB-1 (industry term); Disodium 4-chloro-4'-[6-(sulfooxy)-2H-naphtho[1,2-d]triazol-2-yl]-2,2'-stilbenedisulfonate
EINECS	Contact for details

Quality Control

Our production of 4-Chloro-4'-[6-Sodiooxysulfonyl-2H-Naphtho[1,2-D]Triazol-2-Yl]-2,2'-Stilbenedisulfonic Acid Disodium Salt adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including HPLC for purity and spectrophotometry for whitening efficacy, to ensure consistent performance and batch-to-batch reliability. Certificates of Analysis (COA) detailing purity, absorbance, and other critical parameters are provided to guarantee compliance with your specific application requirements.

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 prevent moisture absorption, which can affect product performance and flow characteristics.

Specification

Item	Specification
Appearance	Yellowish to off-white powder
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 98.0%
Moisture Content	≤ 5.0%
Absorbance (in water)	Conforms to typical range
Whitening Effect	Standard fabric test: Conforms
Solubility (in water)	Freely soluble
Heavy Metals (as Pb)	≤ 20 ppm

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