Description

6,6'-Ureylene-Bis(1-Naphthol-3-Sulfonic Acid) is a specialized organic intermediate and dye precursor of significant commercial importance. Its value lies in its unique molecular structure, which serves as a key building block for synthesizing high-performance colorants and functional materials. This compound is primarily sought after by manufacturers in the dyes and pigments, specialty chemicals, and advanced material research sectors.

Application

• Dye and Pigment Intermediate: A crucial precursor for the synthesis of azo dyes, acid dyes, and other complex colorants, particularly those requiring high lightfastness and thermal stability.
• Specialty Chemical Synthesis: Used in the production of functional chemicals, including optical brighteners, fluorescent markers, and photographic chemicals.
• Analytical Reagent: Employed as a complexometric agent or indicator in specific analytical chemistry applications due to its chelating properties.
• Polymer Additive: Investigated for use as a monomer or additive to impart specific properties like UV absorption or ionic character to polymers.
• Research & Development: Serves as a valuable building block in organic synthesis for pharmaceutical and material science research.

Basic Information

Product Name	6,6'-Ureylene-Bis(1-Naphthol-3-Sulfonic Acid)
CAS No.	134-47-4
Molecular Formula	C21H14N2O10S2
Molecular Weight	518.47 g/mol
Synonyms	6,6'-Ureylenebis(1-naphthol-3-sulfonic acid); 1-Naphthol-3-sulfonic acid, 6,6'-ureylenebis-; 6,6'-Carbonyldiimino-bis(1-naphthol-3-sulfonic acid); Acid Yellow 61 (C.I. 18968); Ureylene Bis J Acid; Bis(6-hydroxy-5-sulfo-2-naphthyl)urea; C.I. 18968; Uranine Yellow G
EINECS	205-142-1

Quality Control

Our production of 6,6'-Ureylene-Bis(1-Naphthol-3-Sulfonic Acid) adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise customer specifications and industry standards. A Certificate of Analysis (COA) detailing all relevant parameters is provided with each shipment and is 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). Keep away from strong oxidizing agents and incompatible materials.

Specification

Item	Specification
Appearance	Yellow to brownish-yellow powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0% (Typical 97-99%)
Loss on Drying	≤ 2.0%
Sulfated Ash	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm
Solubility	Soluble in water and alkaline solutions

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