Description

6,12-Bis[(Sodiosulfo)Oxy]-2,8-Diphenylanthra[2,1-D:6,5-D']Bisthiazole is a high-value, water-soluble fluorescent whitening agent (FWA) and optical brightener. Its core value lies in its exceptional ability to absorb UV light and re-emit it as visible blue light, thereby enhancing the perceived whiteness and brightness of materials. This compound is essential for manufacturers in the textile, paper, plastics, and detergent industries seeking to achieve superior product aesthetics and performance. Its disulfonated structure provides excellent solubility and substantivity for a wide range of applications.

Application

• Textile Finishing: As a critical optical brightener for synthetic fibers like polyester, nylon, and their blends, providing high whiteness and brightness.
• Paper Manufacturing: Used in coating formulations and pulp to produce high-quality, bright white papers, including photographic and writing grades.
• Polymer and Plastics Processing: Incorporated into polymers such as PVC, polystyrene, and polyolefins to counteract yellowing and improve visual appeal in molded articles and films.
• Detergent and Laundry Care: A key ingredient in premium laundry detergents and fabric softeners to impart a "whiter-than-white" appearance to laundered fabrics.
• Advanced Materials: Potential use in security inks, optical sensors, and other specialty applications leveraging its fluorescent properties.

Basic Information

Item	Details
Product Name	6,12-Bis[(Sodiosulfo)Oxy]-2,8-Diphenylanthra[2,1-D:6,5-D']Bisthiazole
CAS No.	13109-68-7
Molecular Formula	C34H18N2Na2O8S4
Molecular Weight	780.75 g/mol
Synonyms	Anthra[2,1-d:6,5-d']bisthiazole-2,8-diphenol, 6,12-bis(sodiooxy)-, disulfate; Fluorescent Brightener 199; Optical Brightener 199; FWA 199; OB 199; 2,8-Diphenyl-6,12-bis(sodiosulfooxy)anthra[2,1-d:6,5-d']bisthiazole; 6,12-Bis(sodiosulfooxy)-2,8-diphenylanthra[2,1-d:6,5-d']bisthiazole
EINECS	Contact for details

Quality Control

Our production of 6,12-Bis[(Sodiosulfo)Oxy]-2,8-Diphenylanthra[2,1-D:6,5-D']Bisthiazole adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including HPLC for purity and assay, spectrophotometry for color strength and shade, and tests for solubility and moisture content. We provide a Certificate of Analysis (COA) with each shipment, detailing all relevant specifications to ensure consistency and performance for your specific application.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). This product is hygroscopic (moisture-sensitive); the container must be kept tightly sealed after opening to prevent absorption of atmospheric moisture, which can affect performance.

Specification

Item	Specification
Appearance	Yellowish to light brown powder
Identification (IR)	Conforms
Assay (HPLC)	≥ 95.0%
Color Strength	100 ± 5% (vs. Standard)
Moisture (Karl Fischer)	≤ 5.0%
Solubility in Water	Clear, yellow solution at 1%
pH (1% Aqueous Solution)	7.0 - 9.0
Heavy Metals (as Pb)	≤ 20 ppm

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