Description

1,4-Benzenedisulfonic Acid, 2,2-1,2-Ethenediylbis(3-Sulfo-4,1-Phenylene)Imino6-(Phenylamino)-1,3,5-Triazine-4,2-Diyliminobis-, Hexasodium Salt is a high-purity, water-soluble anionic compound belonging to the class of fluorescent whitening agents (FWAs) or optical brighteners. Its core value proposition lies in its exceptional ability to absorb ultraviolet light and re-emit it as visible blue light, thereby enhancing the perceived whiteness and brightness of materials. This makes it a critical performance additive for manufacturers in the textile, paper, detergent, and plastics industries seeking superior product aesthetics. Consistent quality and reliable supply are paramount for ensuring batch-to-batch uniformity in demanding industrial applications.

Application

• Textile Finishing: As a key optical brightener for synthetic fibers like polyester and nylon, as well as cotton blends, to achieve high degrees of whiteness.
• Laundry Detergent Formulation: Incorporated into premium powder and liquid detergents to compensate for fabric yellowing and deliver a "whiter-than-white" visual effect on clothes.
• Paper Manufacturing: Used in coating formulations for high-quality writing, printing, and specialty papers to improve brightness and opacity.
• Plastics and Polymer Processing: Added to polymers such as PVC, polyethylene, and polystyrene to correct inherent yellowness and enhance the brightness of finished plastic products.
• Cosmetics and Personal Care: Employed in certain formulations, like shampoos and soaps, to impart a bright, clean appearance to the product itself.
• Industrial Coatings and Paints: Acts as a brightening agent in specific coating systems to improve the visual appeal of the coated surface.

Basic Information

Item	Details
Product Name	1,4-Benzenedisulfonic Acid, 2,2-1,2-Ethenediylbis(3-Sulfo-4,1-Phenylene)Imino6-(Phenylamino)-1,3,5-Triazine-4,2-Diyliminobis-, Hexasodium Salt
CAS No.	27074-79-9
Molecular Formula	C₄₀H₂₄N₁₂Na₆O₁₈S₆
Molecular Weight	~1371.1 g/mol
Synonyms	Hexasodium 2,2'-(1,2-ethenediyldi-4,1-phenylene)bis[6-[(4-sulfophenyl)amino]-1,3,5-triazine-4,2-diylimino]bis(1,5-disulfonaphthalene-3-sulfonate); Fluorescent Brightener 220; FWA 220; Optical Brightener 220; OB 220; Tinopal CBS-X; Blankophor BBU; Benzenesulfonic acid, 2,2'-(1,2-ethenediylbis((3-sulfo-4,1-phenylene)imino(6-(phenylamino)-1,3,5-triazine-4,2-diylimino)))bis-, hexasodium salt
EINECS	Contact for details

Quality Control

Our production of Fluorescent Brightener 220 adheres to stringent quality management protocols to ensure product consistency and performance reliability. Every batch undergoes comprehensive analytical testing, including HPLC for purity and isomer distribution, spectrophotometry for strength and hue, and checks for solubility and heavy metal content. We provide detailed Certificates of Analysis (COA) with each shipment, confirming compliance with agreed specifications. Our quality system supports customer needs for ISO, GMP, and REACH compliance documentation.

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 original container must be kept tightly sealed to prevent absorption of atmospheric moisture, which can affect performance. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Yellowish-green powder
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
pH (1% Solution)	7.0 - 9.5
Ash Content (as Sulfate)	≤ 30.0%
Heavy Metals (as Pb)	≤ 20 ppm
Solubility in Water	Clear, yellowish-green solution

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