Description

4,4'-Bis(3-Phenylureido)-2,2'-Stilbenedisulphonic Acid is a specialized organic compound featuring a stilbene core functionalized with phenylurea and sulphonic acid groups. This unique molecular structure makes it a valuable intermediate and functional additive in advanced material science and specialty chemical synthesis. It is primarily sought by manufacturers and R&D teams in the optical brightening agent (OBA), polymer modification, and high-performance dye sectors.

Application

• Optical Brightening Agent (OBA) Intermediate: A key precursor in the synthesis of high-efficiency fluorescent whitening agents for paper, textiles, and plastics.
• Polymer Additive: Used to modify polymer properties, potentially enhancing UV stability or introducing specific functional groups into polymer chains.
• Specialty Dye Synthesis: Serves as a building block for creating complex, sulfonated dyes with specific light-fastness and solubility properties.
• Research & Development: Employed in academic and industrial R&D for studying fluorescence, molecular recognition, and as a model compound in supramolecular chemistry.
• Analytical Reagent: Can be utilized as a standard or reagent in analytical methods due to its distinct spectroscopic signature.

Basic Information

Product Name	4,4'-Bis(3-Phenylureido)-2,2'-Stilbenedisulphonic Acid
CAS No.	25738-35-6
Molecular Formula	C34H28N4O8S2
Molecular Weight	684.73 g/mol
Synonyms	2,2'-Stilbenedisulfonic acid, 4,4'-bis[[(phenylamino)carbonyl]amino]-; 4,4'-Bis(3-phenylureido)stilbene-2,2'-disulfonic acid; Fluorescent Brightener Intermediate; DAS 1 (common industry abbreviation); 4,4'-Bis(phenylcarbamoylamino)stilbene-2,2'-disulfonic acid; NSC 403058; Phenylurea-stilbenedisulfonic acid derivative
EINECS	Contact for details

Quality Control

Our production of 4,4'-Bis(3-Phenylureido)-2,2'-Stilbenedisulphonic Acid adheres to stringent in-process controls to ensure batch-to-batch consistency and high purity. Every lot is analyzed using advanced techniques like HPLC and NMR to confirm identity and quantify impurities. Certificates of Analysis (COA) detailing purity, assay, and specific tests are provided and available upon request to support your quality assurance protocols.

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). Keep away from strong acids and organic solvents. The container should be kept tightly sealed to protect the integrity of the product.

Specification

Item	Specification
Appearance	Yellow to light brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0%
Sulfated Ash	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm

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