Description

4-Hydroxy-3-[(4-Sulpho-1-Naphthyl)Azo]Naphthalene-1-Sulphonic Acid is a synthetic azo dye intermediate, specifically a naphthalene-based disulfonated compound. This chemical is valued for its ability to impart vivid color and its excellent water solubility, making it a crucial precursor in the production of high-performance dyes and pigments. It is primarily required by manufacturers in the textile, ink, and specialty chemical industries for creating a range of red to violet shades with good light and wash fastness properties.

Application

• Textile Dyeing: As a key intermediate for synthesizing acid dyes and direct dyes used on wool, silk, nylon, and paper.
• Ink Manufacturing: Used in the formulation of inks for packaging, printing, and writing instruments to achieve specific red-violet hues.
• Pigment Production: Serves as a precursor for lake pigments and other colorants used in plastics, coatings, and paints.
• Biological Staining: Potential use in histological stains and laboratory indicators due to its chromophoric properties.
• Research & Development: Employed in chemical research as a model azo compound for studies on synthesis, photochemistry, or dye degradation.

Basic Information

Product Name	4-Hydroxy-3-[(4-Sulpho-1-Naphthyl)Azo]Naphthalene-1-Sulphonic Acid
CAS No.	13613-55-3
Molecular Formula	C₂₀H₁₂N₂O₈S₂
Molecular Weight	472.45 g/mol
Synonyms	Acid Red 299; C.I. 18130; 1-Naphthalenesulfonic acid, 4-hydroxy-3-[(4-sulfo-1-naphthalenyl)azo]-; 4-Hydroxy-3-[(4-sulfo-1-naphthyl)azo]-1-naphthalenesulfonic acid; 3-[(4-Sulfo-1-naphthyl)azo]-4-hydroxy-1-naphthalenesulfonic acid; 4-Hydroxy-3-(4-sulfo-1-naphthylazo)naphthalene-1-sulfonic acid; 4-Hydroxy-3-[(4-sulpho-1-naphthyl)azo]naphthalene-1-sulphonic acid; C.I. Acid Red 299
EINECS	Contact for details

Quality Control

Our production of 4-Hydroxy-3-[(4-Sulpho-1-Naphthyl)Azo]Naphthalene-1-Sulphonic Acid adheres to strict quality management protocols. Each batch undergoes rigorous analytical testing to ensure consistent purity, color strength, and chemical composition. Certificates of Analysis (COA) detailing key parameters such as assay, impurity profile, and solubility are available upon request to support your quality assurance processes.

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	Dark red to brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Solubility	Freely soluble
Loss on Drying	≤ 2.0%
Sulfated Ash	≤ 0.5%

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