Description

4,4'-Bis[4-Morpholino-6-(p-Sulfoanilino)-1,3,5-Triazin-2-Ylamino]-2,2'-Stilbenedisulfonic Acid is a high-purity, sulfonated stilbene derivative belonging to the class of fluorescent whitening agents (FWAs) or optical brighteners. This compound is engineered to absorb ultraviolet light and re-emit it as visible blue light, thereby enhancing the perceived whiteness and brightness of materials. It is a critical component for manufacturers in the textile, paper, detergent, and plastics industries seeking to achieve superior product aesthetics and performance.

Application

• Textile Finishing: As a key optical brightener for synthetic fibers like polyester, nylon, and acetate, as well as their blends, to impart a brilliant white appearance.
• Paper Manufacturing: Used in high-quality writing, printing, and specialty papers to increase brightness and opacity, reducing the need for blue dyes.
• Detergent & Laundry Care: Incorporated into laundry detergents, fabric softeners, and soaps to compensate for fabric yellowing and make white clothes appear cleaner and brighter.
• Plastics and Polymers: Applied in the production of plastics, coatings, and adhesives to improve visual appeal and counteract inherent yellowness.
• Advanced Material Synthesis: Serves as a functional intermediate or monomer in the synthesis of specialty polymers and materials requiring photoactive or sulfonated properties.

Basic Information

Product Name	4,4'-Bis[4-Morpholino-6-(p-Sulfoanilino)-1,3,5-Triazin-2-Ylamino]-2,2'-Stilbenedisulfonic Acid
CAS No.	51461-29-1
Molecular Formula	C44H46N12O14S4
Molecular Weight	1111.2 g/mol
Synonyms	Fluorescent Brightener 220; FWA 220; Tinopal CBS-X; 2,2'-(1,2-Ethenediyl)bis[5-[4-[4-morpholino-6-[(4-sulfophenyl)amino]-1,3,5-triazin-2-yl]amino]benzenesulfonic acid]; 4,4'-Bis(4-anilino-6-morpholino-1,3,5-triazin-2-yl)amino-2,2'-stilbenedisulfonic acid; Optical Brightener OB-1; Stilbene Brightener 220; Disodium 4,4'-bis[(4-anilino-6-morpholino-1,3,5-triazin-2-yl)amino]stilbene-2,2'-disulfonate
EINECS	257-208-6

Quality Control

Our production of 4,4'-Bis[4-Morpholino-6-(p-Sulfoanilino)-1,3,5-Triazin-2-Ylamino]-2,2'-Stilbenedisulfonic Acid adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including HPLC for purity and assay, spectrophotometry for color and brightness evaluation, and tests for heavy metals and residual solvents. A Certificate of Analysis (COA) detailing all specifications is provided with each shipment to ensure traceability and compliance with your quality 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). This material 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	Light yellow to yellow powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Brightness (Fluorescence)	Standardized against reference
Moisture Content (KF)	≤ 5.0%
pH (1% Solution)	6.0 - 8.0
Heavy Metals (as Pb)	≤ 20 ppm
Sulfated Ash	≤ 0.5%

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