Description

2-Hydroxy-3-[(1-Hydroxy-4-Sulfo-2-Naphthalenyl)Azo]-5-Sulfobenzoic Acid Trisodium Salt is a high-purity, water-soluble azo dye intermediate and analytical reagent. This compound is valued for its precise chromophoric properties and consistent performance in demanding industrial and laboratory processes. It is primarily utilized by manufacturers in the dye and pigment industry, as well as by research institutions for colorimetric analysis and specialized chemical synthesis.

Application

• Dye and Pigment Manufacturing: Serves as a critical intermediate for the synthesis of acid dyes, direct dyes, and reactive dyes, particularly for coloring textiles like wool, silk, and nylon.
• Analytical Chemistry: Used as a colorimetric reagent and complexometric indicator in analytical procedures for the detection and quantification of metal ions.
• Biological Staining: Employed in histological and cytological staining applications for microscopic examination in life science research.
• Ink Formulation: A component in the production of specialized inks requiring specific color fastness and solubility properties.
• Laboratory Research: Acts as a building block in organic synthesis for developing novel azo compounds with targeted functionalities.
• Industrial Process Indicators: Can be formulated into chemical indicators for monitoring pH or specific reactions in industrial processes.

Basic Information

Product Name	2-Hydroxy-3-[(1-Hydroxy-4-Sulfo-2-Naphthalenyl)Azo]-5-Sulfobenzoic Acid Trisodium Salt
CAS No.	5858-43-5
Molecular Formula	C17H9N2Na3O11S2
Molecular Weight	566.35 g/mol
Synonyms	Acid Chrome Blue K; Mordant Blue 1; C.I. 43830; Chrome Azurol S; Trisodium 2-hydroxy-3-[(1-hydroxy-4-sulfo-2-naphthyl)azo]-5-sulfobenzoate; 3-[(1-Hydroxy-4-sulfo-2-naphthyl)azo]-2-hydroxy-5-sulfobenzoic acid trisodium salt; CAS 5858-43-5; Aluminon (related compound, check specific grade)
EINECS	227-479-3

Quality Control

Our production of 2-Hydroxy-3-[(1-Hydroxy-4-Sulfo-2-Naphthalenyl)Azo]-5-Sulfobenzoic Acid Trisodium Salt adheres to stringent quality management protocols. Every batch is subjected to comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise specifications for color value and chemical composition. Certificates of Analysis (COA) documenting all critical parameters are available upon request to support your quality assurance and regulatory compliance needs.

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 (moisture-sensitive) nature, the container must be kept sealed to prevent absorption of atmospheric moisture, which can affect product performance and stability.

Specification

Item	Specification
Appearance	Dark brown to reddish-brown powder
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Water Solubility	Clear solution at 1% (w/v)
Heavy Metals (as Pb)	≤ 20 ppm
pH (1% Solution)	6.0 - 8.0

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