Description

2-[4-[2-(4-Amino-2-Sulphophenyl)Vinyl]-3-Sulphophenyl]-2H-Naphtho[1,2-D]Triazole-5-Sulphonic Acid is a high-purity, multi-sulfonated fluorescent brightening agent (FBA) and optical brightener. This compound is valued for its exceptional whitening and brightening effects on synthetic fibers and polymers, enhancing the visual appeal and perceived quality of finished materials. It is primarily utilized by manufacturers in the textile, plastics, and paper industries seeking to achieve superior optical properties in their products.

Application

• Synthetic Fiber Brightening: Key application in the production of polyester, nylon, and acetate fibers to impart a brilliant white appearance and counteract yellowing.
• Plastics and Polymer Processing: Used as an additive in engineering plastics, films, and injection-molded parts to improve brightness and color consistency.
• Detergent and Laundry Care Formulations: Incorporated into premium laundry detergents and fabric softeners to provide a "whiter-than-white" effect on textiles during washing.
• Paper Coating and Finishing: Applied in high-quality paper manufacturing to enhance the brightness and opacity of coated papers and specialty boards.
• Advanced Material Synthesis: Serves as a functional intermediate or monomer in the development of specialty dyes, pigments, and light-emitting materials.

Basic Information

Product Name	2-[4-[2-(4-Amino-2-Sulphophenyl)Vinyl]-3-Sulphophenyl]-2H-Naphtho[1,2-D]Triazole-5-Sulphonic Acid
CAS No.	63216-86-4
Molecular Formula	C30H21N5O9S3
Molecular Weight	707.71 g/mol
Synonyms	Fluorescent Brightener 220; FBA 220; 2,2'-(1,2-Ethenediyl)bis[5-[4,5-dihydro-6-hydroxy-4-oxo-5-(phenylamino)-3H-1,2,3-triazo[4,5-b]pyridin-3-yl]benzenesulfonic acid] (related structure); Optical Brightener OB-1 (commercial); 4,4'-Bis[(4-anilino-6-hydroxy-1,3,5-triazin-2-yl)amino]stilbene-2,2'-disulfonic acid derivative; Triazinylaminostilbene disulfonic acid derivative; Benzenesulfonic acid, 2,2'-(1,2-ethenediyl)bis[5-(4,5-dihydro-6-hydroxy-4-oxo-5-(phenylamino)-3H-1,2,3-triazolo[4,5-b]pyridin-3-yl)-; Brightener for synthetic fibers
EINECS	Contact for details

Quality Control

Our production of 2-[4-[2-(4-Amino-2-Sulphophenyl)Vinyl]-3-Sulphophenyl]-2H-Naphtho[1,2-D]Triazole-5-Sulphonic Acid adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure consistent performance and batch-to-batch reliability. Certificates of Analysis (COA) detailing all specifications are provided and available upon request to support your quality assurance processes.

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 (moisture-sensitive) nature, the container must be kept sealed to prevent absorption of atmospheric moisture, which can affect product performance and handling.

Specification

Item	Specification
Appearance	Yellow to light brown powder
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Sulfated Ash	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (in water)	Partially soluble, forms colloidal dispersion

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