Description

Trisodium (8E)-7-Oxo-8-[(4-Sulfonatonaphthalen-1-Yl)Hydrazinylidene]Naphthalene-1,3-Disulfonate is a high-purity, water-soluble organic dye intermediate characterized by its multi-sulfonated naphthalene structure. This compound matters for its role as a critical precursor in the synthesis of specialized dyes and pigments, offering excellent solubility and chromophoric properties. It is primarily needed by manufacturers in the textile, ink, and specialty chemical industries seeking to produce vivid, stable colors.

Application

• Primary Intermediate for Azo Dyes: Serves as a key building block in the production of acid dyes and direct dyes for textiles like wool, silk, and nylon.
• Specialty Ink Formulations: Used in the manufacture of high-performance inks for jet printing and security applications.
• Functional Pigment Synthesis: Acts as a precursor for creating pigments with specific light-fastness and chemical resistance properties.
• Laboratory Reagent: Employed in research and development for studying dye chemistry and synthesizing novel chromophores.
• Biomedical Staining: Potential use in the development of histological stains and diagnostic indicators.
• Photographic Industry: Can be utilized in the synthesis of sensitizing dyes for photographic films and papers.

Basic Information

Product Name	Trisodium (8E)-7-Oxo-8-[(4-Sulfonatonaphthalen-1-Yl)Hydrazinylidene]Naphthalene-1,3-Disulfonate
CAS No.	51811-48-4
Molecular Formula	C₂₀H₁₁N₂Na₃O₁₀S₃
Molecular Weight	644.43 g/mol
Synonyms	7-Oxo-8-[(4-sulfo-1-naphthyl)hydrazono]naphthalene-1,3-disulfonic acid trisodium salt; Trisodium 8-[(4-sulfonato-1-naphthyl)hydrazinylidene]-7-oxonaphthalene-1,3-disulfonate; C.I. Acid Orange 20; Orange II trisodium salt; Tropaeolin OOO; 1-Naphthalenesulfonic acid, 4-[(2,4-disulfo-7-oxo-8-naphthalenyl)hydrazono]-, trisodium salt; Acid Orange A; Dye Intermediate 51811-48-4
EINECS	Contact for details

Quality Control

Our Trisodium (8E)-7-Oxo-8-[(4-Sulfonatonaphthalen-1-Yl)Hydrazinylidene]Naphthalene-1,3-Disulfonate is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure consistent purity and performance. Certificates of Analysis (COA) detailing identity, assay, and impurity profiles are 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 a controlled 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 quality and handling properties.

Specification

Item	Specification
Appearance	Orange 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)	Contact for details

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