Description

3-[(7-Sulfo-2-Naphtyl)Azo]-5-Hydroxy-7-[3-(7-Sulfo-5-Hydroxy-2-Naphtyl)Ureido]-2-Naphthalenesulfonic Acid Trisodium Salt is a high-purity, water-soluble azo dye intermediate and analytical reagent. This compound is valued for its strong chromophoric properties and ability to form stable complexes with metal ions, making it a critical component in specialized colorant systems. It is primarily required by manufacturers in the dye and pigment industry, as well as by research laboratories for analytical chemistry and diagnostic applications.

Application

• Dye and Pigment Synthesis: A key intermediate for producing high-value, water-soluble azo dyes and pigments, particularly for textiles, inks, and specialty coatings.
• Analytical Reagent: Used in complexometric titrations and as a colorimetric indicator for the detection and quantification of specific metal ions in laboratory settings.
• Biological Staining: Employed in histology and cytology for staining tissue samples, leveraging its specific binding affinity.
• Chemical Research: Serves as a building block in organic synthesis and materials science research for developing novel functional molecules.
• Diagnostic Kits: A component in the formulation of colorimetric diagnostic reagents and test strips used in clinical and environmental testing.

Basic Information

Product Name	3-[(7-Sulfo-2-Naphtyl)Azo]-5-Hydroxy-7-[3-(7-Sulfo-5-Hydroxy-2-Naphtyl)Ureido]-2-Naphthalenesulfonic Acid Trisodium Salt
CAS No.	6330-95-6
Molecular Formula	C31H19N5Na3O14S3
Molecular Weight	874.66 g/mol
Synonyms	Acid Chrome Blue K; Chrome Azurol S; CAS 6330-95-6; Mordant Blue 29; C.I. 43825; Trisodium 3-[(7-sulphonato-2-naphthyl)azo]-5-hydroxy-7-[3-(7-sulphonato-5-hydroxy-2-naphthyl)ureido]naphthalene-2-sulphonate; 3-[(7-Sulfo-2-naphthalenyl)azo]-5-hydroxy-7-[[[3-(7-sulfo-5-hydroxy-2-naphthalenyl)amino]carbonyl]amino]-2-naphthalenesulfonic acid trisodium salt
EINECS	228-693-5

Quality Control

Our production of 3-[(7-Sulfo-2-Naphtyl)Azo]-5-Hydroxy-7-[3-(7-Sulfo-5-Hydroxy-2-Naphtyl)Ureido]-2-Naphthalenesulfonic Acid Trisodium Salt adheres to stringent quality management protocols. Every batch undergoes rigorous analytical testing to ensure consistent purity, color strength, and performance. Certificates of Analysis (COA) detailing key specifications such as assay, impurity profile, and solubility are provided to guarantee compliance with your technical 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 product is hygroscopic (moisture-sensitive); the container must be kept tightly sealed to prevent absorption of atmospheric moisture, which can affect purity and performance.

Specification

Item	Specification
Appearance	Dark brown to reddish-brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Water Solubility	Freely soluble
Heavy Metals (as Pb)	≤ 20 ppm
Residue on Ignition (Sulfated Ash)	28.0 - 32.0%

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