Description

Tinopal An is a high-performance optical brightener agent (OBA) belonging to the stilbene derivative class. This compound is essential for enhancing the whiteness and brightness of materials by absorbing ultraviolet light and re-emitting it as visible blue light. It is a critical component for manufacturers in the detergent, paper, textile, and plastics industries seeking to improve the visual appeal and perceived quality of their products.

Application

• Detergent & Laundry Care: Primary application as a fluorescent whitening agent (FWA) in laundry detergents, powders, and liquids to make white fabrics appear brighter and colored fabrics more vivid.
• Paper Manufacturing: Used in the production of high-quality writing, printing, and packaging papers to achieve a high degree of whiteness and opacity.
• Textile & Fiber Treatment: Applied in the finishing process of natural and synthetic fibers, including cotton, polyester, and nylon, to impart a bright, clean white appearance.
• Plastics & Polymers: Incorporated into various polymers, such as PVC and polyolefins, to correct yellowness and enhance the brightness of molded plastic articles and films.
• Cosmetics & Personal Care: Utilized in certain formulations, like shampoos and soaps, to provide a visual whitening or brightening effect.

Basic Information

Product Name	Tinopal An
CAS No.	24260-77-3
Molecular Formula	C₂₈H₂₀O₆S₂Na₂
Molecular Weight	562.56 g/mol
Synonyms	Tinopal AN; Fluorescent Brightener 220; 4,4'-Bis[(4-anilino-6-morpholino-1,3,5-triazin-2-yl)amino]stilbene-2,2'-disulfonic acid disodium salt; 2,2'-(1,2-Ethenediyl)bis[5-[[4-[(4-morpholinyl)-6-(phenylamino)-1,3,5-triazin-2-yl]amino]benzenesulfonic acid] disodium salt; C.I. Fluorescent Brightener 220; FBA 220; Blankophor BA 267; Leucophor BSB
EINECS	246-125-6

Quality Control

Our Tinopal An is manufactured under strict quality management systems to ensure batch-to-batch consistency and high performance. Every lot undergoes comprehensive analytical testing, including HPLC assay, spectrophotometric analysis for strength and hue, and tests for solubility and stability. Certificates of Analysis (COA) detailing purity, physical properties, and performance characteristics are available upon request.

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). Due to its hygroscopic nature, the container must be kept tightly sealed to prevent moisture absorption, which can affect performance. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Yellowish-green powder
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 98.0%
Strength (Spectrophotometry)	100 ± 3%
Moisture Content	≤ 5.0%
Ash Content	≤ 0.5%
Solubility in Water	Clear, faint yellow solution
pH (1% Solution)	7.0 - 9.0

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